Physical Properties of Industrial Gases and Common Industrial Chemicals

Material Safety Data Sheets (MSDS) are an important resource for safety awareness and education as well as a reference tool for emergency preparedness and emergency response programs and teams. 
MSDS provide information about the composition, characteristics and potential hazards of gas and liquid products.  They include tips on safe handling, and information useful to emergency response and other medical personnel about ways to avoid adverse effects and deal with health problems.
OSHA regulations require that MSDS be supplied to all purchasers of potentially hazardous products and that employers make appropriate MSDS available, at all times, to those working in areas where exposure to hazardous materials may occur. 

(English Units) Every employer has the responsibility to maintain current copies of MSDS in a central location on the worksite in a manner that ensures that employees are able to refer to them while they are in their work areas during all shifts.  This requirement may be met in many ways; for instance, by maintaining hard copies of current MSDS in a binder or by maintaining links to the MSDS through accessible computer systems and terminals.

			NormalBoiling Point (1 atm)		Gas Phase Properties @ 32°F & @1 atm			Liquid Phase Properties @ B P& @ 1 atm		Triple Point		Critical Point
			Temp.	Latent Heat of Vaporization	Specific Gravity	Specific Heat (Cp)	Density	Specific Gravity	Specific Heat (Cp)	Temp.	Pressure	Temp.	Pressure	Density
Substance	Chemical Symbol	Mol. Weight	° F	BTU/lb	Air = 1	BTU/lb °F	lb/cu. ft	Water = 1	BTU/lb °F	°F	psia	°F	psia	lb/cu ft
Air	--	28.98	-317.8	88.2	1	0.241	0.08018	0.873	0.4454	-352.1	--	-221.1	547	21.9
Oxygen	O2	32.00	-297.3	91.7	1.113	0.2197	0.089212	1.14	0.4058	-361.8	0.02147	-181.43	731.4	27.22
Nitrogen	N2	28.01	-320.4	85.6	0.9737	0.249	0.07807	0.808	0.4877	-346.0	1.81	-232.4	493	19.6
Argon	Ar	39.95	-302.6	69.8	1.39	0.125	0.11135	1.4	0.2575	-308.8	9.99	-188.1	711.5	33.44
Carbon Dioxide	CO2	44.01	-109.3a	245.5b	1.524	0.199	0.12341	1.18c	--	-69.9	75.1	87.9	1070.6	29.2
Hydrogen	H2	2.02	-423	191.7	0.06998	3.425	0.005611	0.071	2.309	-434.6	1.045	-399.93	190.8	1.88
Carbon Monoxide	CO	28.01	-312.7	92.79	0.9736	0.2478	0.07806	0.79	--	-337.1	2.2	-220.4	507.5	18.79
Water	H2O	18.02	212	970.6	--	0.8784d	0.0368d	0.95855	1.007	32.0	0.088	705.182	3200.5	20.1
Methane	CH4	16.04	-258.68	219.22	0.559	0.593	0.0448	0.425	0.8314	-296.5	1.69	-115.78	673.1	10.09
Ammonia	NH3	17.03	-28	589.3	0.6003	0.520	0.04813	0.6819	--	-107.9	0.88	271.4	1657	14.7
Helium	He	4.00	-452.06	8.72	0.139	1.25	0.01114	0.124	1.086	NONE	NONE	-450.31	33	4.347
Neon	Ne	20.18	-410.9	37.08	0.701	0.25	0.05621	1.207	0.4483	-415.4	6.29	-379.8	384.9	30.15
Krypton	Kr	83.80	-244	46.2	2.887	0.06	0.2315	2.41	0.1273	-251.3	10.6	-82.8	798	56.7
Xenon	Xe	131.30	-162.6	41.4	4.55	0.038	0.365	3.06	0.08121	-169.2	11.84	61.9	847	68.67
Ozone	O3	47.99	-168.3	6530	1.656	9.41	--	1.352	--	-314.5	1.65	10.13	808.1	33.71
Hydrogen Sulfide	H2S	34.08	-76.4	235.6	1.198	0.245	0.09608	0.9136	--	--	--	212.9	1306.5	21.6
Sulfur Dioxide	SO2	64.06	14	167.5	2.279	0.149	0.18272	1.46	--	-103.9	0.2429	315.4	1143	32.6
Ethane	C2H6	30.07	-127.53	210.41	1.056	0.386	0.08469	0.546	--	-297.9	14.70	86.96	708.35	12.67
Ethylene	C2H4	28.05	-154.8	208	0.978	0.399	0.07868	0.567	--	-272.5	1.0146	49.82	745	14.2
Acetylene	C2H2	26.04	-118.4a	264c	0.906	0.383	0.07314	0.613	--	-116.0	17.7	96.8	907	14.4
Propane	C3H8	44.10	-43.67	183.05	1.573	0.388	0.1261	0.58	--	--	--	206.01	616.3	13.5
Propylene	C3H6	42.08	-53.9	188.18	1.481	0.355	0.11249	0.61	--	--	--	197.2	670	14.5
Methanol	CH3OH	32.04	148.2	473	--	0.3274	0.0893	0.795	0.6055	-143.4	--	464.1	1154.2	16.981
a Sublimation point       b Sublimation Enthalpy       c Triple point       d Boiling point