Saturday, 19 May 2018

PERMISSIBLE EXPOSURE LIMITS FOR CHEMICAL CONTAMINANTS

TABLE AC-1
PERMISSIBLE EXPOSURE LIMITS FOR CHEMICAL CONTAMINANTS
Chemical
Abstracts
Registry
Number 
(a)
Skin(b)Name(c)PEL (d)

 STEL (o)

ppm(e)mg/M3(f)Ceiling(g)ppm(e)mg/M3(f)

75070 Acetaldehyde2545C  
64197 Acetic acid102540 ppm1537
108247 Acetic Anhydride520C  
67641 Acetone50012003000 ppm7501780
75868 Acetone cyanohydrin as CN4.75C  
75058SAcetonitrile4070 60105
98862 Acetophenone1049   
53963S2-Acetylaminofluorene; N-fluoren-2-yl acetamide;     
  see Section 5209     
74862 Acetylene(h)    
540590 Acetylene dichloride; see 1,2-Dichloroethylene     
79276 Acetylene tetrabromide:1,1,2,2-tetrabromoethane114   
79345 Acetylene tetrachloride; see 1,1,2,2-     
  Tetrachloroethane     
50782 Acetylsalicylic acid (Aspirin) 5   
107028SAcrolein0.10.25C  
79061SAcrylamide--0.03   
79107SAcrylic acid25.9   
107131SAcrylonitrile; see Section 521324.5   
124049 Adipic acid--5   
111693SAdiponitrile28.8   
309002SAldrin; 1,2,3,4,10,10-hexachloro-1,4,4a,5,8,8a-     
  hexahydro-endo-1,2-exo-5,8-     
  dimethanonaphthalene--0.25   
107186SAllyl alcohol0.51.25 410
107051 Allyl chloride13 26
106923SAllyl glycidyl ether; AGE0.20.93   
2179591 Allyl propyl disulfide212 318
1344281 Alumina; see Particulates not otherwise regulated     
  Aluminum, alkyls (not otherwise classified)--2   
  Aluminum soluble salts--2   
  Aluminum metal and oxide--    
  Total dust--10   
  Respirable fraction(n)--5(n)   
  Aluminum pyro powders--5   
  Aluminum welding fumes--5   
300925 Aluminum distearate--10   
7047849 Aluminum stearate--10   
637127 Aluminum tristearate--10   
1300738 Aminodimethylbenzene; see Xylidene     
92671S4-Aminodiphenyl; see Section 5209     
141435 2-Aminoethanol; see Ethanolamine     
91598 2-Aminonapthalene; see beta-Naphthylamine,     
  Section 5209     
504290 2-Aminopyridine0.52   
61825 Amitrole--0.2   
7664417 Ammonia2518 3527
3825261SAmmonium perfluorooctanoate--00.1   
12125029 Ammonium chloride fume--10 --20
1002897 Ammonium stearate--10   
7773060 Ammonium sulfamate--    
  Total dust--10   
  Respirable fraction(n)--5   
620111 3-Amyl acetate; See Pentyl acetate     
628637 n-Amyl acetate; See Pentyl acetate     
626380 sec-Amyl acetate (all isomers and mixtures); See Pentyl acetate     
625161 tert-Amyl acetate; See Pentyl acetate    
62533SAniline27.6   
29191524SAnisidine (ortho and para isomers)0.10.5   
  Antimony and compounds, as Sb--0.5   
86884 ANTU; 1-(1-naphthyl)-2-thiourea; Bantu; Rattrack--0.3   
7440371 Argon(h)    
7440382 Arsenic and inorganic arsenic compounds; see also 0.01   
  Section 5214     
  Arsenic, organic compounds, as As--0.2   
7784421 Arsine; AsH30.050.2   
1332-21-4 Asbestos (including actinolite, amosite     
  anthophyllite, chrysotile, crocidolite, and tremolite);     
  see Section 5208     
8052424 Asphalt (petroleum) fumes--5   
1912249 Atrazine--5   
86500SAzinphos methyl; o,o-dimethyl S-(4-oxo-1,2,3---0.2   
  benzotriazin-3(4H)-ylmethyl) phosphorodithioate     
3333526S2,2'-Azobisisobutyronitrile decomposition product,     
  see Tetramethyl succinonitrile     
7440393 Barium, soluble compounds, as Ba--0.5   
7727437 Barium sulfate; see Particulates not otherwise regulated     
17804352 Benomyl     
  Total dust--10   
  Respirable fraction(n)--5   
71432SBenzene; see also Section 52181  5--
92875SBenzidine; 4,4'-diaminobiphenyl, see Section 5209     
71432 Benzol; see Benzene     
106514 D-Benzoquinone; see Quinone     
98884 Benzoyl chloride0.21.1C  
94360 Benzoyl peroxide; dibenzoyl peroxide--5   
140114 Benzyl acetate1061   
100447 benzyl chloride; alpha-chlorotoluene0.030.16   
7440417 Beryllium, and beryllium compounds as Be
(see also Sections 1535.1, 5205 and 8359.1)
--0.00020.025mg/M3--0.002
92524 Biphenyl; diphenyl; phenylbenzene0.21.5   
542881 Bis(chloromethyl) ether, see bis-Chloromethyl ether,     
  Section 5209     
3033623SBis (Dimethylaminoethyl) ether (DMAEE)0.050.328 0.150.983
1304821 Bismuth telluride     
  Total dust--10   
  Respirable fraction(n)--5   
  Bismuth telluride (selenium-doped)--5   
  Borates, tetra, sodium salts     
  Anhydrous--5   
  Decahydrate--5   
  Pentahydrate--5   
1303862 Boron oxide--10   
10294334 Boron tribromide110C  
7637072 Boron trifluoride13C  
314409 Bromacil110   
7726956 Bromine0.10.7C  
7789302 Bromine pentafluoride0.10.7   
74975 Bromochloromethane; see Chlorobromethane     
74964 Bromoethane; see Ethyl bromide     
75252SBromoform; tribromomethane0.55   
74839 Bromomethane, see Methyl bromide     
106945S1-bromopropane, n-propyl bromide525   
75638 Bromotrifluoromethane; see Trifluorobromomethane     
106990 1,3-Butadiene (see also section 5201)12.2 511
106978 Butane8001,900   
109795 1-Butanethiol; see Butyl mercaptan     
71363 1-Butanol; see n-Butyl alcohol     
78933 2-Butanone; see Methyl ethyl ketone     
111762S2-Butoxyethanol (EGBE)2097   
123864 n-Butyl acetate150710 200950
105464 sec-Butyl acetate200950   
540885 tert-Butyl acetate200950   
141322 Butyl acrylate211   
71363Sn-Butyl alcohol; 1-butanol50150C  
78922 sec-Butyl alcohol100305   
75650 tert-Butyl alcohol100300 150450
109739SButylamine515C  
1189851Stert-Butyl chromate; di-tert-butyl     
  chromate, as CrO3--0.1C  
                   as Cr 0.005   
    (see also Sections 1532.2, 5206 & 8359)     
2426086 n-Butyl glycidyl ether; BGE;25135   
  1-butoxy-2,3-epoxypropane     
138227 n-Butyl lactate525   
109795 n-Butyl mercaptan0.51.5   
89725So-sec-Butylphenol530   
98511 p-tert-Butyltoluene16.1 20120
7440439 Cadmium metal dust, as Cd     
  (see also Sections 1532 & 5207)--0.005   
  Cadmium, soluble salts, as Cd     
  (see also Sections 1532 & 5207)--0.005   
1306190 Cadmium oxide fume, as Cd     
  (see also Sections 1532 & 5207 )--0.005   
7778441 Calcium arsenate; see Arsenic,inorganic (see     
  also Section 5214)     
471341 Calcium carbonate; see Particulates not otherwise regulated --   
156627 Calcium cyanamide--0.5   
1305620 Calcium hydroxide--5   
1305788 Calcium oxide--2   
  Calcium silicate; see Particulates not otherwise regulated     
1344952 Calcium silicate (synthetic): see Particulates not otherwise regulated     
1592230 Calcium stearate--10   
7778189 Calcium sulfate; see Particulates not otherwise regulated     
76222 Camphor (synthetic)--2   
105602 Caprolactam dust--1 --3
105602 Caprolactam vapor520 1040
2425061SCaptafol--0.1   
133062 Captan--5   
63252 Carbaryl; 1-naphthyl N-methylcarbamate--5   
1563662 Carbofuran--0.1   
1333864 Carbon black--3.5   
124389 Carbon dioxide5,0009,000 30,00054,000
75150SCarbon disulfide1330 ppm1236
630080 Carbon monoxide2529200 ppm  
558134 Carbon tetrabromide0.11.4 0.34
56235SCarbon tetrachloride212.6200 ppm1063
75445 Carbonyl chloride; see Phosgene     
353504 Carbonyl fluoride25 515
120809SCatechol; pyrocatechol520   
9004346 Cellulose (paper fiber); see Particulates not otherwise regulated     
21351791 Cesium hydroxide 2   
57749SChlordane; 1,2,4,5,6,7,8,8-octachloro-3a,4,7,7a---0.5   
  tetrahydro-4,7-methanoindane     
8001352SChlorinated camphene; toxaphene--0.5 --1
  Chlorinated diphenyl oxide--0.5   
7782505 Chlorine0.51.5 13
10049044 Chlorine dioxide0.10.3 0.30.9
7790912 Chlorine trifluoride0.10.4C  
107200 Chloroacetaldehyde13C  
78955SChloroacetone13.8C  
532274 alpha-Chloroacetophenone;phenacyl chloride0.050.3   
79049SChloroacetyl chloride0.050.2 0.150.69
108907 Chlorobenzene; monochlorobenzene1046   
2698411So-Chlorobenzylidene malononitrile; OCBM0.050.4C  
74975 Chlorobromomethane; bromochloromethane2001,050   
126998S2-Chloro-1,3-butadiene; see Chloroprene     
75456 Chlorodifluoromethane; Fluorocarbon 221,0003,500   
53469219SChlorodiphenyl (42% chlorine)--1   
11097691SChlorodiphenyl (54% chlorine)--0.5   
106898 1-Chloro-2,3-epoxypropane; see Epichlorohydrin     
75003 Chloroethane; see Ethyl chloride     
107073 2-Chloroethanol; see Ethylene chlorohydrin     
75014 Chloroethylene, see Vinyl chloride, Section 5210     
67663 Chloroform; trichloromethane29.78   
74873 Chloromethane, see Methyl chloride     
107302 Chloromethyl methyl ether; see Methyl     
  chloromethyl ether, Section 5209     
542881 bis-Chloromethyl ether, see also Section 52090.0010.005   
100005 1-Chloro-4-nitrobenzene; see     
  p-Nitrochlorobenzene     
600259 1-Chloro-1-nitropropane210   
76153 Chloropentafluoroethane1,0006,320   
76062 Chloropicrin; trichloronitromethane0.10.7   
126998SChloroprene; 2-chloro-1,3-butadiene1036   
598787S2-Chloropropionic acid0.10.44   
2039874 o-Chlorostyrene50285 75428
95498So-Chlorotoluene50250   
1929824 2-Chloro-6-(trichloromethyl)pyridine; see Nitrapyrin     
2921882SChlorpyrifos--0.2   
  Chromite ore processing (chromate), as Cr--0.005   
 (see also Sections 1532.2, 5206 & 8359)     
7440473 Chromium metal--0.5   
  Chromium (II) compounds, as Cr--0.5   
  Chromium (III) compounds, as Cr--0.5   
  Chromium (VI) compounds, as Cr--0.0050.1mg/M3  
 (see also Sections 1532.2, 5206 & 8359)     
14977618 Chromyl chloride0.0250.15   
2971906 Clopidol--    
  Total dust--10   
   Respirable fraction--5   
  Coal (Bituminous) dust     
  <5% quartz, respirable fraction(n)--0.9   
  >5% quartz, respirable fraction(n)--0.1   
  Coal tar pitch volatiles(i)--0.2   
7440484 Cobalt, metal fume and dust, as Co--0.020   
  Cobalt carbonyl, as Co--0.1   
16842038 Cobalt hydrocarbonyl, as Co--0.1   
  Coke oven emissions, see Section 5211 0.15   
7440508 Copper metal fume, as Cu--0.1   
  Copper salts, dusts and mists, as Cu--1   
  Corundum, see Particulates not otherwise regulated     
  Cotton dust, see also Section 5190--1(j)   
1319773SCresol (all isomers)522   
123739SCrotonaldehyde; beta-methylacrolein  0.3  
4170303       
299865 Crufomate--5   
98828SCumene; isopropylbenzene50245   
420042 Cyanamide--2   
 SCyanide, as CN--5   
460195 Cyanogen1020   
506774 Cyanogen chloride0.30.6C  
110827 Cyclohexane3001,050   
108930SCyclohexanol50200   
108941SCyclohexanone25100   
110838 Cyclohexene3001,015   
108918SCyclohexylamine1040   
121824SCyclonite; RDX; cyclotrimethylenetrinitramine--0.07   
542927 Cyclopentadiene75200   
287923 Cyclopentane6001,720   
13121705 Cyhexatin; tricyclohexyltin hydroxide 5   
94757 2,4-D;2,4-dichlorophenoxyacetic acid--10   
50293SDDT; 1,1,1-trichloro-2,2-bis-     
  (p-chlorophenyl)ethane--1   
62737 DDVP, see Dichlorvos     
17702419SDecaborane0.050.3 0.150.9
8065483SDemeton; a mixture of o,o-diethyl     
  o-2(ethylthio)ethyl phosphorothloate and     
  o,o'-diethyl S-2(ethylthio)ethyl phosphorothioate0.010.1   
123422 Diacetone alcohol; 4-hydroxy-4-methyl-     
  2-pentanone50240   
107153 1,2-Diaminoethane; see Ethylenediamine     
  Diatomacous earth; see Silica-amorphous     
333415SDiazinon; o,o-diethyl o-(2-isopropyl-6---0.1   
  methyl-4-pyrimidinyl) phosphorothioate     
334883 Diazomethane0.20.4   
94360 Dibenzoyl peroxide; see Benzoyl peroxide     
19287457 Diborane0.10.1   
2528361SDibutyl phenyl phosphate0.33.5   
96128 1,2-Dibromo-3-chloropropane; DBCP;.001.01   
  see Section 5212     
75616 Dibromodifluoromethane; see     
  Difluorodibromomethane     
106934S1,2-Dibromomethane; see Ethylene dibromide,     
  Section 5219     
102818S2-N-Dibutylaminoethanol214   
107664 Dibutyl phosphate15 210
84742 Dibutyl phthalate--5   
7572294 Dichloroacetylene0.10.4C  
95501So-Dichlorobenzene2515050 ppm  
106467 p-Dichlorobenzene; 1,4-dichlorobenzene1060200 ppm110675
91941S3,3'-Dichlorobenzidine; 4,4'-diamino-3,3'-     
  dichlorobiphenyl; see Section 5209     
764410S1,4 -Dichloro-2-butene0.0050.025   
75718 Dichlorodifluoromethane100049506200 ppm  
118525 1,3-Dichloro-5,5-dimethyl hydantoin--0.2 --0.4
75343 1,1-Dichloroethane100400   
107062 1,2-Dichloroethane, see Ethylene dichloride     
75354 1,1-Dichloroethylene; see Vinylidene chloride     
540590 1,2-Dichloroethylene; acetylene dichloride200790   
111444SDichloroethyl ether; bis(2-chloroethyl) ether530 1060
75434 Dichlorofluoromethane; Fluorocarbon 211042   
75092 Dichloromethane; see Methylene chloride     
594729 1,1-Dichloro-1-nitroethane210   
78875 1,2-Dichloropropane; see Propylene dichloride     
542756SDichloropropene15   
75990 2,2-Dichloropropionic acid16   
76142 1,2-Dichlorotetrafluoroethane; Fluorocarbon 1141,0007,000   
62737SDichlorvos (DDVP); 2,2-dichlorovinyl     
  dimethyl phosphate0.11   
141662SDicrotophos--0.25   
5124301 Dicyclohexylmethane-4,4'-diisocyanate;     
  see Methylene bis-(4-cyclohexylisocyanate)     
77736 Dicyclopentadiene530   
102545 Dicyclopentadienyl iron--    
  Total dust--10   
  Respirable fraction(n)--5   
60571SDieldrin; 1,2,3,4,10,10-hexachloro-6,7-epoxy-     
  1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-exo-5,8-     
  dimethanonaphthalene--0.25   
111422SDiethanolamine0.462   
109897SDiethylamine515C  
112367SDiethylene glycol diethyl ether,     
  Ethyl diglyme533   
111966SDiethylene glycol dimethyl ether, Diglyme15.5 527
100378S2-(Diethylamino) ethanol29.6   
123911 1,4-Diethylene dioxide; see p-Dioxane     
111400S Diethylenetriamine14   
60297 Diethyl ether; see Ethyl ether     
117817 Di-(2-ethylhexyl) phthalate;     
  see Di-sec-octyl phthalate     
96220 Diethyl ketone200705 3001057
84662 Diethyl phthalate--5   
75616 Difluorodibromomethane; dibromodifluoromethane100860   
2238075 Diglycidyl ether; DGE; bis(2,3-epoxypropyl)     
  ether0.10.5   
123319 p-Dihydroxybenzene; see Hydroquinone     
108838 Diisobutyl ketone; 2,6-dimethyl-4-heptanone25150   
108189SDiisopropylamine520   
108203 Diisopropyl ether; see Isopryl ether     
109875 Dimethoxymethane; see Methylal     
127195SDimethylacetamide1035   
124403 Dimethylamine59.2 1527.6
60117 4-Dimethylaminoazobenzene, see Section 5209     
1300738 Dimethylaminobenzene; see Xylidene     
121697SN,N-Dimethylaniline; dimethylphenylamine525 1050
1330207 Dimethylbenzene; see Xylene     
108849 1,3-Dimethylbutyl acetate; see sec-     
  Hexyl acetate     
300765 o,o-Dimethyl o-(1,2-dibromo-2,2-dichloroethyl)     
  phosphate; see Naled     
14857342 Dimethylethoxysilane0.52.1 1.56.4
68122SDimethylformamide; DMF1030   
108838 2,6-Dimethyl-4-heptanone; see     
  Diisobutyl ketone     
57147S1,1-Dimethylhydrazine0.010.025   
67641 Dimethyl ketone; see Acetone     
62759 N,N-Dimethylnitrosamine; see     
  N-Nitrosodimethylamine, Section 5209     
131113 Dimethyl phthalate--5   
77781SDimethyl sulfate; methyl sulfate0.10.5   
148016 Dinitolmide; 3,5-Dinitro-o-toluamide--5   
528290,SDinitrobenzene (all (isomers)     
99650, ortho, meta and     
100254 para isomers0.151   
534521S4,6-Dinitro-o-cresol; 2-methyl-     
  4,6-dinitrophenol--0.2   
25321146S2,4-Dinitrotoluene--0.15   
123911Sp-Dioxane;     
  1,4-dioxacyclohexane;0.281.0   
  1,4-diethylene dioxide     
78342SDioxathion--0.2   
92524 Diphenyl; see Biphenyl     
122394 Diphenylamine; N-phenylaniline--10   
101688 Diphenylmethane diisocyanate; see     
  Methylene bis(phenylisocyanate)     
123193 Dipropyl ketone50235   
34590948SDipropylene glycol methyl ether100600 150900
85007 Diquat; 1,1'-ethylene-2,2'-     
  dipyridinium dibromide--    
  Total dust--0.5   
  Respirable fraction(n)     
117817 Di-sec-octyl phthalate; bis(2 ethylhexyl) phthalate--5 --
97778 Disulfiram--2   
298044SDisulfoton; o,o-diethyl     
   S-2-(ethylthio)ethyl phosphorodithioate--0.1   
128370 2,6-Di-tert-butyl-p-cresol--10   
330541 Diuron--10   
68122 DMF; see Dimethylformamide     
57147 DMH; see 1,1-Dimethylhydrazine     
1321740 Divinyl benzene1050   
  Dust, nuisance dust and particulates,     
  see Particulates not otherwise regulated     
12415348 Emery; see Particulates not otherwise regulated     
115297SEndosulfan; 6,7,8,9,10,10-hexachloro-     
  1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,     
  3-benzodioxathiepin-3-oxide--0.1   
72208SEndrin; 1,2,3,4,10,10-hexachloro-6,7-epoxy-     
  1,4,4a,5,6,7,8,8a-octahydro-1,4-endo-endo-5,     
  8-dimethanonaphthalene--0.1   
13838169 Enflurane215   
106898SEpichlorohydrin; 1-chloro-2,     
  3-epoxypropane0.050.19   
2104645SEPN; o-ethyl o-(p-nitrophenyl)     
  phenylphosphonothioate--0.1   
75569 1,2-Epoxypropane; see Propylene oxide     
556525 2,3-Epoxypropanol; see Glycidol     
74840 Ethane(h)--   
75081 Ethanethiol; see Ethyl mercaptan     
64175 Ethanol; see Ethyl alcohol     
141435 Ethanolamine; 2-aminoethanol38 615
563122SEthion--0.4   
110805S2-Ethoxyethanol518   
111159S2-Ethoxyethyl acetate527   
141786 Ethyl acetate4001,400   
140885SEthyl acrylate520 25100
64175 Ethyl alcohol; ethanol1,0001,900   
75047SEthylamine59.2C  
541855 Ethyl sec-amyl ketone; 5-methyl-3-heptanone25130   
100414 Ethylbenzene522 30130
74964SEthyl bromide522   
106354 Ethyl butyl ketone; 3-heptanone50230 75345
75003SEthyl chloride; chloroethane100264   
7085850Ethyl cyanoacrylate0.21.02   
673923Ethyl tert-butyl ether521   
74851 Ethylene(h)--   
107073SEthylene chlorohydrin; 2-chloroethanol13C  
107153 Ethylenediamine; 1,2-diaminoethane1025   
106934SEthylene dibromide; 1,2-dibromoethane,     
  see Section 52190.131C  
107062 Ethylene dichloride; 1,2-dichloroethane14200 ppm28
107211 Ethylene glycol (vapor)40100C  
629141SEthylene glycol diethyl ether, 1,2-diethoxyethane524   
110714SEthylene glycol dimethyl ether,13.7 518
  1,2-dimethoxyethane, Glyme     
628966SEthylene glycol dinitrate (k) --0.1
110805SEthylene glycol monoethyl ether, see     
  2-Ethoxyethanol     
109864SEthylene glycol monomethyl ether, see     
  2-Methoxyethanol     
110496SEthylene glycol monomethyl ether acetate;     
  see 2-Methoxyethyl acetate     
151564SEthyleneimine; see also Section 52090.51   
75218 Ethylene oxide; see Section 522012 5 
60297 Ethyl ether4001,200 5001500
109944 Ethyl formate100300   
75343 Ethylidene chloride; see 1,1-Dichloroethane     
16219753 Ethylidene norbornene525C  
75081 Ethyl mercaptan; ethanethiol0.51   
78933 Ethyl methyl ketone; see Methyl ethyl ketone     
100743SN-Ethylmorpholine; 4-ethyl-1,     
   4-tetrahydrooxazine523   
78104 Ethyl silicate; tetraethyl silicate1085   
22224926SFenamiphos 0.1   
115902 Fensulfothion--0.1   
55389SFenthion--0.2   
14484641 Ferbam; ferric N,N-dimethylthiocarbamate--10   
12604589 Ferrovanadium dust--1 --3
14808607 Fibrous glass, see Glass     
  Flour dust 0.5(s)   
  Fluorides, as F--2.5   
7782414 Fluorine0.10.2   
75694 Fluorocarbon 11; see Trichlorofluoromethane     
75718 Fluorocarbon 12; see Dichlorodifluoromethane     
75434 Fluorocarbon 21; see Dichlorofluoromethane     
75456 Fluorocarbon 22; see Chlorodifluoromethane     
76120 Fluorocarbon 112; see 1,1,2,2-Tetrachloro-     
  1,2-difluoroethane     
76131 Fluorocarbon 113; see 1,1,2-Trichloro-1,2,2-     
  trifluoroethane     
  Fluorocarbon 114; see 1,2-     
  Dichlorotetrafluoroethane     
75694 Fluorotrichloromethane; see     
  Trichlorofluoromethane     
944229SFonofos--0.1   
50000 Formaldehyde, see Section 52170.75-- 2--
75127SFormamide1018   
64186 Formic acid59 1019
98011SFurfural28   
98000SFurfuryl alcohol1040 1560
8006619 Gasoline300900 5001500
7782652 Germanium tetrahydride0.20.6   
  Glass, fibrous1.0 f/cc(q)    
111308 Glutaraldehyde (t)0.050.2C  
56815 Glycerin mist; see Particulates not otherwise regulated     
123944 Glyceryl stearate--10   
556525 Glycidol; 2,3-epoxy-1-propanol26.1   
111762 Glycol monobutyl ether; see 2-Butoxyethanol     
110805 Glycol monoethyl ether; see 2-Ethoxyethanol     
109864 Glycol monoethyl ether; see 2-Methoxyethanol     
107222 Glyoxal, 1,2-ethanedione 0.1(s), (u)   
  Grain dust (oat, wheat, barley)--10   
7782425 Graphite, natural respirable dust 2.5   
  Graphite, synthetic     
  Total dust--10   
  Respirable fraction(n)--5   
13397245 Gypsum; Calcium sulfate dihydrate; see     
  Particulates not otherwise regulated     
7440586 Hafnium--0.5   
151677 Halothane216   
822060 HDI; see Hexamethylene diisocyanate     
7440597 Helium(h)--   
76448SHeptachlor; 1,4,5,6,7,8,8-hepta-chloro-     
  3a,4,7,7a-tetrahydro-4,7-methanoindene--0.05   
142825 n-Heptane4001,600 5002000
118741SHexachlorobenzene--0.002   
87683SHexachlorobutadiene0.020.24   
77474 Hexachlorocyclopentadiene0.010.11   
67721SHexachloroethane; perchloroethane110   
1335871SHexachloronaphthalene--0.2   
684162SHexafluoroacetone; 1,1,1,3,3,3-hexafluoro-     
  2-propanone0.10.7   
822060 Hexamethylene diisocyanate; HDI0.0050.034   
110543Sn-Hexane50180   
  Hexane, other isomers5001800 10003600
124094 1,6-Hexanediamine0.52.3   
591786 2-Hexanone; see Methyl butyl ketone     
592416 1-Hexene50180   
108101 Hexone; see Methyl isobutyl ketone     
108849 sec-Hexyl acetate; 4-methyl-2-pentyl acetate;     
  1,3-dimethyl-butyl acetate50300   
107415 Hexylene glycol25125C  
302012SHydrazine0.010.013   
10035106 Hydrobromic acid; see Hydrogen bromide     
7647010 Hydrochloric acid; see Hydrogen chloride     
74908 Hydrocyanic acid; see Hydrogen cyanide     
7664393 Hydrofluoric acid; see Hydrogen fluoride     
1333740 Hydrogen(h)--   
61788327 Hydrogenated terphenyls0.55   
10035106 Hydrogen bromide310C  
7647010 Hydrogen chloride0.30.452 ppm  
74908SHydrogen cyanide4.75C  
7664393SHydrogen fluoride, as F0.40.33 10.83
7722841 Hydrogen peroxide, as H2O211.4   
7783075 Hydrogen selenide, as Se0.050.2   
7783064 Hydrogen sulfide101450 ppm1521
123319 Hydroquinone; 1,4-benezendiol--2   
999611S2-Hydroxypropyl acrylate0.53   
95136 Indene1048   
7440746 Indium--0.1   
  Indium compounds--0.1   
7553562 Iodine0.11C  
75478 Iodoform0.610   
4098719 IPDI; see Isophorone diisocyanate     
1309371 Iron oxide fume--5   
13463406 Iron pentacarbonyl, as Fe0.10.8 0.21.6
  Iron salts, soluble, as Fe--1   
123922 Isoamyl acetate; 3-methylbutyl acetate; see Pentyl acetate     
123513 Isoamyl alcohol; 3-methylbutanol100360 125450
110190 Isobutyl acetate; 2-methylpropyl acetate150700   
78831 Isobutyl alcohol; 2-methylpropanol50150   
26675467 Isoflurane215   
26952216SIsooctyl alcohol50270   
78591 Isophorone; 3,5,5-trimethyl-2-cyclohexene-     
  1-one423   
4098719SIsophorone diisocyanate; IPDI0.0050.045 0.02--
109591 Isopropoxyethanol25105   
108214 Isopropyl acetate250950 3101185
67630 Isopropyl alcohol400980 5001225
75310 Isopropylamine512 1024
768525SN-isopropylaniline210   
108203 Isopropyl ether; diisopropyl ether2501,050   
4016142 Isopropyl glycidyl ether; IGE;     
  1,2-epoxy-3-isopropoxypropane50240 75360
1332587 Kaolin; (respirable dust containing no     
  asbestos and <1% crystaline silica)--2   
463514 Ketene; ethenone0.50.9 1.53
  Lead arsenate, see Sections 5214 and 5198     
7758976 Lead chromate, as Pb--0.02   
  as Cr--0.005   
  (see also Section 5198, 1532.1, 1532.2, 5206 & 8359)     
  Lead (metallic) and inorganic compounds, dust     
  and fume, as Pb (see also Section 5198 )--0.05   
78002 Lead tetraethyl, see Tetraethyl lead     
75741 Lead tetramethyl, see Tetramethyl lead     
1317653 Limestone; calcium carbonate; see     
  Particulates not otherwise regulated     
58899SLindane; 1,2,3,4,5,6-hexachlorocyclohexane,     
  gamma isomer--0.5   
7580678 Lithium hydride--0.025   
  L.P.G.; liquefied petroleum gas1,0001,800   
4485125 Lithium stearate--10   
13717005 Magnesite; magnesium carbonate; see     
  Particulates not otherwise regulated     
1309484 Magnesium oxide fume, as Mg--10   
557040 Magnesium stearate--10   
121755SMalathion; o,o-dimethyl S-1(1,2-     
  dicarboethyoxyethyl) phosphorodithioate--10   
108316 Maleic anhydride; cis-butenedioic anhydride0.10.4   
  Manganese and compounds, as Mn--0.2   
7439965 Manganese fume, as Mn--0.2 --3
12079651SManganese, cyclopentadienyl-tricarbonyl,     
  as Mn--0.1   
  Manganese tetroxide--0.2   
  Marble; calcium carbonate; see     
  Particulates not otherwise regulated     
101779SMDA; see 4,4'-Methylene dianiline     
101688 MDI; see Methylene bis(phenylisocyanate)     
7439976SMercury alkyls, as Hg--0.010.04 mg/M3--0.03
7439976SMercury, metallic and inorganic compounds as Hg--0.0250.1 mg/M3  
7439976SMercury aryl compounds as Hg--0.01C  
108678 Mesitylene; see 1,3,5-Trimethylbenzene     
141797 Mesityl oxide; 4-methyl-3-pentene-2-one1560 25100
79414SMethacrylic acid2070   
74828 Methane(h)--   
74931 Methanethiol; see Methyl mercaptan     
67561 Methanol; see Methyl alcohol     
16752775SMethomyl--2.5   
72435 Methoxychlor; 1,1,1-trichloro-2,     
  2-bis(p-methoxyphenyl)ethane--10   
109864S2-Methoxyethanol516   
110496 2-Methoxyethyl acetate524   
76380 Methoxyflurane213   
150765 4-Methoxyphenol--5   
79209 Methyl acetate200610 250760
74997 Methyl acetylene; propyne1,0001,650   
  Methyl acetylene-propadiene mixture; MAPP1,0001,800 12502250
96333SMethyl acrylate1035   
126987Salpha-Methylacrylonitrile13   
6244192-Methylbutyl acetate; see Pentyl acetate     
109875 Methylal; dimethoxymethane1,0003,100   
67561SMethyl alcohol; methanol2002601000 ppm250325
74895 Methylamine56.4 1519
108112 Methyl amyl alcohol; see Methyl     
  isobutyl carbinol     
110430 Methyl n-amyl ketone; 2-heptanone50235   
100618SN-Methylaniline; monomethylaniline0.52   
95534 o-Methylaniline; see o-Toluidine     
74839SMethyl bromide13.8820 ppm  
591786SMethyl n-butyl ketone; 2-hexanone14 1040
74873 Methyl chloride50105300 ppm100210
71556 Methyl chloroform; 1,1,1-trichloroethane3501900800 ppm4502450
107302 Methyl chloromethyl ether; see Section 5209     
75058 Methyl cyanide; see Acetonitrile     
137053 Methyl 2-cyanoacrylate0.20.908   
108872 Methylcyclohexane4001,600   
25639423 Methylcyclohexanol (meta- and     
  para-isomer mixture)50235   
583608So-Methylcyclohexanone50230 75345
12108133S2-Methylcyclopentadienyl manganese     
  tricarbonyl, as Mn--0.2   
8022002SMethyl demeton; a mixture of o,o-dimethyl     
  o-(2-(ethylthio)ethyl) phosphorothioate and     
  o,o-dimethyl S-(2-(ethylthio)-ethyl)     
  phosphorothioate--0.5   
101144S4,4'-Methylene bis(2-chloroaniline),--0.01   
  see also Section 5215     
5124301 Methylene bis(4-cyclohexylisocyanate);     
  hydrogenated MDI0.0050.054   
101688 Methylene bis(phenylisocyanate); MDI;     
  diphenylmethane diisocyanate0.0050.051   
75092 Methylene chloride; dichloromethane2587 125435
  (see also section 5202)     
101779S4,4'-Methylene dianiline; MDA0.010.08 0.10.8
  (see also Sections 1535 and 5200 )     
78933 Methyl ethyl ketone; MEK; 2-butanone;     
  ethyl methyl ketone200590 300885
1338234 Methyl ethyl ketone peroxide0.21.5C  
107313 Methyl formate100250 150375
60344SMethyl hydrazine; monomethyl hydrazine0.010.019   
74884SMethyl iodide210   
110123 Methyl isoamyl ketone50234   
108112SMethyl isobutyl carbinol; 4-methyl-2-pentanol;     
  methyl amyl alcohol25100 40165
108101 Methyl isobutyl ketone; Hexone50205 75300
624839SMethyl isocyanate0.020.05   
563804 Methyl isopropyl ketone200705   
74931 Methyl mercaptan0.51   
80626 Methyl methacrylate; methyl     
  2-methyl-2-propenoate50205 100410
298000SMethyl parathion; o,o-dimethyl     
  o-(p-nitrophenyl) phosphorothioate--0.2   
107879 Methyl propyl ketone; 2-pentanone200700 250875
872504SN-Methylpyrrolidone (NMP);14   
  1-Methyl-2-pyrrolidone;   
  N-Methyl-2-pyrrolidone;   
  1-Methyl-2-pyrrolidinone   
681845 Methyl silicate; tetramethyl silicate16   
98839 alpha-Methylstyrene; 1-methyl-     
  1-phenylethene50240 100485
77781 Methyl sulfate; see Dimethyl sulfate     
1634044 Methyl tert-butyl ether; MTBE40144   
78944SMethyl vinyl ketone0.050.14C  
21087649 Metribuzin--5   
7786347SMevinphos; 2-carbomethoxyl-     
  1-propen-2-yl dimethyl phosphate0.010.1 0.030.3
  Mica, see Silicates     
  Mineral wool fiber; see Particulates not otherwise regulated     
7439987 Molybdenum, insoluble compounds, as Mo--    
   Total dust--10   
   Respirable fraction (n)--3   
  Molybdenum, soluble compounds, as Mo--0.5(n)   
6923224 Monocrotophos--0.25   
100618 Monomethylaniline; see N-Methylaniline     
60344 Monomethylhydrazine; see Methyl hydrazine     
110918SMorpholine; tetrahydro-4H-1, 4-oxazine2070 30105
7647010 Muriatic acid; see Hydrogen chloride     
300765SNaled; o,o-dimethyl o-     
  (1,2-dibromo-2,2-dichloroethyl) phosphate--3   
8030317 Naphtha, coal tar100400   
91203SNaphthalene0.10.5   
134327 alpha-Naphthylamine; 1-naphthylamine,     
  see Section 5209     
91598 beta-Naphthylamine; 2-naphthylamine,     
  see Section 5209     
63252 1-Naphthyl N-methylcarbamate; see Carbaryl     
25551284 Naphthalene diisocyanate; NDI0.010.085C  
7440019 Neon(h)    
13463393 Nickel carbonyl; Ni (CO)40.0010.007   
7440020 Nickel metal, as Ni--0.5   
  Nickel, insoluble compounds, as Ni--0.1   
  Nickel, soluble compounds, as Ni--0.05   
12035722 Nickel subsulfide--0.05   
54115SNicotine; 1-methyl-2-(3-pyridyl)-pyrrolidine0.0750.5   
1929824 Nitrapyrin--    
  Total dust--10   
  Respirable fraction(n)--5   
7697372 Nitric acid25 410
10102439 Nitric oxide; NO2530   
100016Sp-Nitroaniline--3   
98953SNitrobenzene15   
100005Sp-Nitrochlorobenzene;     
  1-chloro-4-nitrobenzene0.10.64   
92933 4-Nitrodiphenyl, see Section 5209     
79243 Nitroethane100310   
7727379 Nitrogen(h)--   
10102440 Nitrogen dioxide   11.8
  Nitrogen tetroxide; N2O4; see Nitrogen dioxide     
7783542 Nitrogen trifluoride1029   
55630SNitroglycerin (k) --0.1
75525 Nitromethane25   
108032 1-Nitropropane2590   
79469 2-Nitropropane1035   
62759 N-Nitrosodimethylamine, see Section 5209     
1321126,SNitrotoluene211   
99081,      
88722,      
99990      
76062 Nitrotrichloromethane; see Chloropicrin     
10024972 Nitrous oxide5090   
111842 Nonane2001,050   
  Nuisance particulates, see Particulates not otherwise regulated     
  Total dust--10   
  Respirable fraction(n)--5   
2234131SOctachloronaphthalene--0.1 --0.3
111659 Octane3001,450 3751800
8012951 Oil (mineral) mist, particulate--(5)(l)   
  Oil (vegetable) mists (except castor, cashew     
  nut or similar irritant oils); see Nuisance     
  particulates     
  Organic arsenic compounds; see     
  Arsenic, organic     
20816120 Osmium tetroxide, as Os0.00020.002 0.00060.006
144627 Oxalic acid--1 --2
7783417 Oxygen difluoride0.050.1C  
10028156 Ozone0.10.2 0.30.6
8002742 Paraffin wax fume--2   
1910425,SParaquat, total particulates--0.5   
2074502      
1910425,SParaquat, respirable sizes--0.1(n)   
2074502      
56382SParathion; o,o-diethyl o-(p-nitrophenyl)     
  phosphorothioate--0.1   
  Particulates not otherwise regulated     
  Total dust--10   
  Respirable fraction(n)--5   
  Particulate polycyclic;     
  aromatic hydrocarbons (PPAH) see     
  Coal tar pitch volatiles     
  PCB; see Chlorodiphenyl     
87865SPCP; see Pentachlorophenol     
19624227 Pentaborane0.0050.01 0.0150.03
1321648SPentachloronaphthalene--0.5   
87865SPentachlorophenol; PCP--0.5   
115775 Pentaerythritol; tetrakis-     
  (hydroxymethyl)methane; tetra-methylolmethane;     
  see Particulates not otherwise regulated     
109660 Pentane6001,800 
107879 2-Pentanone; see Methyl propyl ketone     
628637;
626380;
123922;
625161;
620111;
624419
 Pentyl acetate50266 100532
67721 Perchloroethane; see Hexachloroethane     
127184 Perchloroethylene25170300 ppm100685
594423 Perchloromethyl mercaptan;     
  trichloromethanethiol0.10.8   
7616946 Perchloryl fluoride; C1O3F314 628
382218 Perfluoroisobutylene0.010.082C  
  Perlite     
  Total dust--10   
  Respirable fraction(n)--5   
108952SPhenol519   
92842SPhenothiazine; dibenzothiazine--5   
106503Sp-Phenylenediamine--0.1   
101848 Phenyl ether, vapor17   
100425 Phenylethylene; see Styrene     
122601SPhenyl glycidyl ether, PGE;1,2-epoxy-     
  3-phenoxypropane0.10.6   
100630SPhenylhydrazine520 1045
108985 Phenyl mercaptan0.52   
638211 Phenylphosphine0.050.25C  
298022SPhorate; o,o-diethyl S-(ethylthio)methyl     
  phosphorodithioate--0.05 --0.2
75445 Phosgene; carbonyl chloride; COCl20.10.4   
7803512 Phosphine; PH30.30.4 11
7664382 Phosphoric acid--1 --3
7723140 Phosphorus, yellow--0.1   
10025873 Phosphorus oxychloride0.10.6   
10026138 Phosphorus pentachloride0.11   
1314803 Phosphorus pentasulfide; P2S5--1 --3
7719122 Phosphorus trichloride0.21.5 0.53
85449 Phthalic anhydride16   
626175 m-Phthalodinitrile--5   
1918021 Picloram--    
   Total dust--10   
  Respirable fraction(n)--5   
88891SPicric acid; 2,4,6-trinitrophenol--0.1   
83261 Pindone; 2-pivalyl-1, 3-indandione 0.1   
142643 Piperazine dihydrochloride--5   
26499650 Plaster of Paris; calcium sulfate hemihydrate;     
  see Particulates not otherwise regulated     
7440064 Platinum, metal--1   
  Platinum, soluble salts, as Pt--0.002   
  Polychlorobiphenyls, see Chlorodiphenyl     
  Polytetrafluoroethylene, decomposition products--(m)   
  Portland Cement; see Particulates not otherwise regulated     
1310583 Potassium hydroxide; caustic potash--2C  
593293 Potassium stearate--10   
74986 Propane10001800 (h)   
107197SPropargyl alcohol; 2-propyn-1-o112   
57578 beta-Propiolactone, see Section 52090.51.5   
79094 Propionic acid1030   
114261 Propoxur; 2-isopropoxyphenyl N-methyl     
  carbamate 0.5   
109604 n-Propyl acetate200840 2501050
71238Sn-Propyl alcohol200500 250625
115071 Propylene(h)--   
78875 Propylene dichloride; 1,2-dichloropropane75350 110510
6423434SPropylene glycol dinitrate; PGDN0.050.3   
107982SPropylene glycol monomethyl ether100360 150540
108656SPropylene glycol monomethyl ether acetate100541 150811
75558SPropyleneimine; 2-methylaziridine25   
75569 Propylene oxide; 1,2-epoxy-propane24.75   
627134 n-Propyl nitrate25107 40170
74997 Propyne; see Methylacetylene     
8003347 Pyrethrum--5   
110861 Pyridine515   
106514 Quinone0.10.4   
121824 RDX; see Cyclonite     
  Refractory ceramic fiber 0.2f/cc(q)   
108463 Resorcinol1045 2090
7440166 Rhodium, metal--0.1   
  Insoluble compounds, as Rh--0.1   
  Soluble salts, as Rh--0.001   
299843 Ronnel; o,o-dimethyl o-(2,4,5---10   
  trichlorophenyl) phosphorothioite     
  Rosin core solder, pyrolysis products,     
  as formaldehyde--0.1   
83794 Rotenone, commercial--5   
1309371 Rouge; see Particulates not otherwise regulated     
  Rubber solvent (Naphtha)4001,600   
  Selenium compounds, as Se--0.2   
7783791 Selenium hexafluoride0.050.4   
136787 Sesone; sodium 2,4-dichloro-phenoxyethyl     
   sulfate     
  Total dust--10   
  Respirable fraction(n)--5   
61790532 Silica, amorphous     
  Diatomaceous earth     
  Total dust--6   
  Respirable fraction(n)--3   
  Precipitated and gel--6   
  Silica, crystalline, respirable dust (n)     
14464461 Cristobalite, (see also Sections 1532.3 & 5204)--0.05   
14808607 Quartz, (see also Sections 1532.3 & 5204)--0.05   
60676860 Silica, fused, respirable dust--0.1   
15468323 Tridymite, (see also Sections 1532.3 & 5204)--0.05   
1317959 Tripoli, (as quartz) (see also Sections 1532.3 & 5204)--0.05   
  Silicates (<1% crystalline silica)     
12001262 Mica (respirable dust)--3   
  Soapstone, total dust--6   
  Soapstone, respirable dust--3   
  Talc (containing asbestos); see Section 5208     
14807966 Talc (containing no asbestos fibers),     
  respirable dust--2   
  Tremolite (containing no asbestos fibers),     
  respirable dust--2   
7440213 Silicon; see Particulates not otherwise regulated     
409212 Silicon carbide; SiC; see Particulates not otherwise regulated     
7803625 Silicon tetrahydride; silane57   
7440224 Silver metal, as Ag--0.01   
  Silver, soluble compounds, as Ag--0.01   
  Soapstone, see Silicates     
26628228SSodium azide0.10.3C  
7631905 Sodium bisulfite--5   
136787 Sodium 2,4-dichlorophenoxyethyl sulfate;     
  see Sesone     
62748SSodium fluoroacetate--0.05 --0.15
1310732 Sodium hydroxide; caustic soda--2C  
7681574 Sodium metabisulfite--5   
822162 Sodium stearate--10   
9005258 Starch; see Particulates not otherwise regulated     
7789062 Strontium chromate, as Cr--0.0005   
    (see also Sections 1532.2, 5206 & 8359)     
  Stearates; see specific compound     
7803523 Stibine; SbH30.10.5   
8052413 Stoddard solvent100525   
57249 Strychnine--0.15   
100425SStyrene (monomer); phenylethylene50215500 ppm100425
9014011 Subtilisins (as pure crystalline     
  proteolytic enzymes)--   0.00006(r)
57501 Sucrose; see Particulates not otherwise regulated     
74222972 Sulfometuron methyl--3.5   
3689245SSulfotep; tetraethyl dithionopyrophosphate 0.2   
7446095 Sulfur dioxide25 510
2551624 Sulfur hexafluoride1,0006,000   
7664939 Sulfuric acid--0.1 --3
10025679 Sulfur monochloride; S2Cl216C  
5714227 Sulfur pentafluoride; S2F100.010.1C  
7783600 Sulfur tetrafluoride0.10.4C  
2699798 Sulfuryl fluoride; SO2F2520 1040
35400432 Sulprofos 1   
93765 2,4,5-T;2,4,5-trichlorophenoxyacetic acid--10   
  Talc; see Silicates     
7440257 Tantalum metal dust, as Ta--5   
1314610 Tantalum oxide dust, as Ta--5   
78308 TCP; see Triorthocresyl phosphate     
584849 TDI; see Toluene-2,4-diisocyanate     
3689245STEDP; see Sulfotep     
  Tellurium and compounds, as Te--0.1   
7783804 Tellurium hexafluoride0.020.2   
3383968 Temephos; o,o,o' ,o'-tetramethyl o,o'-     
  thiodi-p-phenylene phosphorothioate     
   Total dust--10   
  Respirable fraction(n)--5   
107493STEPP; tetraethyl pyrophosphate;0.0040.05   
100210 Terephthalic acid--10   
  Terphenyls0.55C  
79276 1,1,2,2-Tetrabromoethane; see     
  Acetylene tetrabromide     
76119 1,1,1,2-Tetrachloro-2,2-difluoroethane5004170   
76120 1,1,2,2-Tetrachloro-1,2-difluoroethane;     
  fluorocarbon 1125004,170   
79345S1,1,2,2-Tetrachloroethane; acetylene     
  tetrachloride17   
127184 Tetrachloroethylene; see Perchloroethylene     
56235 Tetrachloromethane; see Carbon tetrachloride     
1335882STetrachloronaphthalene--2   
3689245 Tetraethyl dithionopyrophosphate; see Sulfotep     
78002STetraethyl lead; tetraethylplumbane, as Pb--0.075   
107493 Tetraethyl pyrophosphate; see TEPP     
109999 Tetrahydrofuran200590 250735
75741STetramethyl lead; tetramethylplumbane, as Pb--0.075   
115775 Tetramethylolmethane; see Pentaerythritol     
3333526STetramethyl succinonitrile (decomposition     
  product of 2,2'-azobisisobutyronitrile)0.53   
137268 Tetramethyl thiuram disulfide, see Thiram     
509148 Tetranitromethane0.0050.04   
7722885 Tetrasodium pyrophosphate--5   
479458STetryl; 2,4,6-trinitrophenylmethylnitramine--1.5   
 SThallium, soluble compounds, as Tl--0.1   
109999 THF; see Tetrahydrofuran     
96695 4,4'-Thiobis(6-tert-butyl-m-cresol)--    
  Total dust--10   
  Respirable fraction(n)--5   
68111SThioglycolic acid13.8   
7719097 Thionyl chloride15C  
137268 Thiram; bis(dimethylthiocarbamoyl) disulfide--5   
 STin, organic compounds, as Sn--0.1 --0.2
21651194 Tin, tin oxide and inorganic compounds,     
  except SnH4, as Sn--2   
13463677 Titanium dioxide, as Ti; see Particulates     
  not otherwise regulated     
137268 TMTD; see Thiram     
118967 TNT; see 2,4,6-Trinitrotoluene     
108883SToluene; toluol1037500 ppm150560
584849 Toluene-2,4-diisocyanate; TDI0.0050.040.02 ppm0.020.15
108441Sm-Toluidine29   
95534So-Toluidine; o-methylaniline29   
106490Sp-Toluidine29   
8001352 Toxaphene; see Chlorinated camphene     
115866 TPP; see Triphenyl phosphate     
  Tremolite, nonasbestiform; see Silicates     
75252 Tribromomethane; see Bromoform     
126738 Tributyl phosphate0.22.5   
76039 Trichloroacetic acid15   
120821 1,2,4-Trichlorobenzene540C  
50293 1,1,1,-Trichloro-2,2-bis(p-chlorophenyl)ethane;     
  see DDT     
71556 1,1,1-Trichloroethane; see Methyl chloroform     
79005S1,1,2-Trichloroethane1045   
79016 Trichloroethylene; trichloroethene25135300 ppm100537
75694 Trichlorofluoromethane; Fluorocarbon 111,0005,600C  
67663 Trichloromethane; see Chloroform     
594423 Trichloromethanethiol; see Perchloromethyl     
  mercaptan     
1321659STrichloronaphthalene--5   
76062 Trichloronitromethane; see Chloropicrin     
93765 2,4,5-Trichlorophenoxyacetic acid     
  see 2,4,5-T     
96184 1,2,3-Trichloropropane1060   
76131 1,1,2-Trichloro-1,2,2- trifluoroethane100076002000 ppm12509500
78308 Tricresyl phosphate; see Triorthocresyl     
  phosphate     
13121705 Tricyclohexyltin hydroxide; see Cyhexatin     
102716 Triethanolamine--5   
121448STriethylamine14.1C  
112492STriethylene glycol dimethyl ether, Triglyme536   
75638 Trifluorobromomethane1,0006,100   
2451629 1,3,5-Triglycidyl-s-triazinetrione 0.005   
552307 Trimellitic anhydride0.0050.04C  
75503 Trimethylamine512 1536
  Trimethylbenzene, all isomers25125   
121459 Trimethyl phosphite210   
88891 2,4,6-Trinitrophenol; see Picric acid     
479458 2,4,6-Trinitrophenylmethyl nitramine;     
  see Tetryl     
118967S2,4,6-Trinitrotoluene; TNT--0.5   
78308STriorthocresyl phosphate--0.1   
603349 Triphenylamine--5   
115866STriphenyl phosphate; TPP--3   
7440337 Tungsten metal, as W--5   
  Tungsten, insoluble compounds, as W--5 --10
  Tungsten, soluble compounds, as W--1 --3
8006642 Turpentine100560   
  Uranium (natural), insoluble compounds, as U--0.2 --0.6
  Uranium (natural), soluble compounds, as U--0.05   
110623 Valeraldehyde50175   
1314621 Vanadium pentoxide (V2O5), respirable dust     
  and fume--0.05(n)   
75014SVC; see Vinyl chloride, Section 5210     
  Vegetable oil mists (except castor, cashew     
  nut or similar irritant oils); see Particulates     
  not otherwise regulated     
108054 Vinyl acetate1030 1545
100425 Vinylbenzene; see Styrene     
593602 Vinyl bromide; bromoethylene0.10.44   
75014SVinyl chloride, see Section 52101    
107131SVinyl cyanide, see Acrylonitrile, Section 5213     
100403S4-Vinyl cyclohexene0.10.4   
106876SVinyl cyclohexene dioxide0.10.57   
75025 Vinyl fluoride0.20.38   
75354 Vinylidene chloride; 1,1-dichloroethylene14   
75387 Vinylidene fluoride100262   
25013154 Vinyltoluene50240   
8030306 VM & P (Varnish Makers and Painters) Naphtha3001,350 4001800
81812 Warfarin; 3-(alpha-acetonyl-benzyl)-4---0.1   
  hydroxycoumarin     
  Welding fumes; total particulates (see also     
  individual constituents)--5   
  Wood dust--    
  All soft and hard woods, except Western     
  red cedar--2 --5
  Wood dust, Western red cedar----0.5   
1330207 Xylene; xylol; dimethylbenzene100435300 ppm150655
1477550Sm-Xylene-a,a'-diamine--0.1C  
1300738SXylidine; aminodimethylbenzene0.52.5   
  Yttrium compounds, as Y--1   
7646857 Zinc chloride fume--1 --2
13530659 Zinc chromate, as Cr--0.005   
    (see also Sections 1532.2, 5206 & 8359)     
15930946 Zinc chromate hydroxide, as Cr--0.005   
    (see also Sections 1532.2, 5206 & 8359)     
1314132 Zinc oxide fume--5 --10
  Zinc oxide dust, see Particulates not otherwise regulated     
11103869 Zinc potassium chromate, as Cr--0.005   
    (see also Sections 1532.2, 5206 & 8359)     
557051 Zinc stearate--10   
37300235 Zinc yellow, as Cr--0.005   
    (see also Sections 1532.2, 5206 & 8359)     
  Zirconium compounds, as Zr--5 --10
s
Footnotes to Table AC-1
(a) The Chemical Abstracts Service Registry Number is a designation used to identify a specific compound or substance regardless of the naming system; these numbers were obtained from the Desk Top Analysis Tool for the Common Data Base and from the Chemical Abstracts Indexes.
(b) Refer to section 5155(d) for the significance of the Skin notation.
(c) Trade Names Removed from Table AC-1.
  Trade Name Chemical/Generic Name
Abate                            see  Temephos
Ammate                           see  Ammonium Sulfamate
Aqualin                          see  Acrolein
Arasan                           see  Thiram
Azodrin                          see  Moncrotophos
Baygon                           see  Propoxur
Bidrin                           see  Dicrotophos
Butyl Cellosolve                 see  2-Butoxyethanol
Cellosolve                       see  2-Ethoxyethanol
Cellosolve Acetate               see  2-Ethoxyethyl acetate
Compound 1080                    see  Sodium Fluoracetate
Coyden                           see  Clopidol
Crag Herbicide                   see  Sesone
Cythion                          see  Malathion
Dasanit                          see  Fensulfothion
Delnav                           see  Dioxathion
Dibrom                           see  Naled
Difolatan                        see  Captafol
Disyston                         see  Disulfoton
Dowtherm A                       see  Phenylether and Biphenyl
Dursban                          see  Chloropyrifos
Dyfonate                         see  Fonofos
Fermate                          see  Ferbam
Freons                           see  Fluorocarbons
Furadan                          see  Carbofuran
Guthion                          see  Azinphos Methyl
Korlan                           see  Ronnel
Lannate                          see  Methomyl
Mariate                          see  Methoxychlor
MLT                              see  Malathion
Moxie                            see  Methoxychlor
Nialate                          see  Ethion
Nankor                           see  Ronnel
Phosdrin                         see  Mevinphos
Pival                            see  Pindone
Plictran                         see  Cyhexatin
Santobrite                       see  Pentachlorophenol
Sevin                            see  Carbaryl
Systox                           see  Demeton
Teflon                           see  Polytetrafluoroethylene
Thimet                           see  Phorate
Thiodan                          see  Endosulfan
Tordon                           see  Picloram
Trolene                          see  Ronnel
Vapona                           see  Dichlorvos
Weedone 638                      see  2, 4-D
Zoalene                          see  Dinitolmide
(d) For the definition and the application of the Permissible Exposure Limit (PEL), refer to section 5155(b) and (c)(1).
(e) Parts of gas or vapor per million parts of air by volume at 25°C and 760mm Hg pressure.
(f) Milligrams of substance per cubic meter of air at 25°C and 760mm Hg pressure.
(g) Refer to section 5155(b) and (c)(3) for the significance of the Ceiling notation. A "C" notation in this column means the values given in the PEL columns are ceiling values. A numerical entry in this column represents a ceiling value in addition to the TWA values.
(h) A number of gases and vapors, when present in high concentrations, act primarily as asphyxiants without other adverse effects. A concentration limit is not included for each material because the limiting factor is the available oxygen. (Several of these materials present fire or explosion hazards.)
(i) Coal tar pitch volatiles (benzene or cyclohexane-soluble fraction) include fused polycyclic hydrocarbons (some of which are known carcinogens) which volatilize from the distillation residues of coal, petroleum (excluding asphalt), wood, and other organic matter. Asphalt (CAS 8052-42-4, and CAS 64742-93-4) is not covered under the "coal tar pitch volatiles" standard.
(j) This standard applies to the cotton waste processing operations of waste recycling (sorting, blending, cleaning, and willowing) and garnetting. It does not apply to cotton gins, cottonseed oil industry, or operations covered by section 5190.
(k) A PEL of 0.05 ppm shall apply to exposures involving a mixture of ethylene glycol dinitrate and nitroglycerin.
(l) As sampled by method that does not collect vapor.
(m) Thermal decomposition of the fluorocarbon chain in air leads to the formation of oxidized products containing carbon, fluorine and oxygen. An index of exposure to these products is possible through their alkaline hydrolysis followed by a quantitative determination of fluoride content. No particular concentration limit is specified pending evaluation of the toxicity of the products but concentrations should be kept below the sensitivity of the analytical method.
(n) The concentration and percentage of the particulate used for this limit are determined from the fraction passing a size selector with the following characteristics:
Aerodynamic Diameter
in Micrometers
(unit density sphere)
Percent
Passing Selector
0..................................................100
1..................................................97
2..................................................91
3...................................................74
4...................................................50
5...................................................30
6...................................................17
7...................................................9
8...................................................5
10....................................................1

(o) Refer to sections 5155(b) and (c)(2) for the definition and application of the Short Term Exposure Limit (STEL).
(p) (Reserved)
(q) Fibers per cubic centimeter of air at 25°C and 760mm Hg pressure. To be considered a fiber for this limit the glass particle must be longer than 5µm, have a length to diameter ratio of three or more, and have a diameter less than 3µm. The National Institute for Occupational Safety and Health (NIOSH), Method 7400, Issue 2, August 15, 1994, which is hereby incorporated by reference, shall be used for measuring airborne fiber concentrations.
(r) Compliance with the subtilisins PEL is assessed by sampling with a high volume sampler (600-800 liters per minute) for at least 60 minutes.
(s) The concentration and percentage of the particulate used for this limit are determined from the fraction passing a size selector with the following characteristics:
Aerodynamic Diameter
in Micrometers
(unit density sphere)
Percent
Passing Selector
0..................................................100
1..................................................97
2..................................................94
5..................................................87
10..................................................77
20..................................................65
30..................................................58
40..................................................54.5
50..................................................52.2
100..................................................50
(t) Glutaraldehyde can cause occupational asthma and skin sensitization responses such as contact dermatitis. Exposure related symptoms may include one or more of the following: shortness of breath, chest tightness, wheeze, cough, skin rash, hives, and irritation of the nose, throat, skin or eye. Hazard communication training required by sections 5191 or 5194 shall address these health hazards and symptoms along with the measures taken by the employer to evaluate and control exposures that can include medical evaluations, exposure monitoring, ventilation systems, work practices, and personal protective equipment. The communication system required by section 3203 shall inform employees where to report possible health symptoms and where to ask questions, report concerns, and receive information about the employer’s evaluation and control measures.
(u) This PEL applies to the sum of the exposures to the substance in the vapor state and from the particulate fraction specified in footnote (s) in this table.
Note:  Authority cited:  Section 142.3, Labor Code.  Reference:  Sections 142.3 and 144.6, Labor Code.

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