Aluminum chlorohydrate is a water-soluble aluminum salt that has multiple uses, including as an antiperspirant and in water purification:

Aluminum chlorohydrate is a water-soluble aluminum salt that has multiple uses, including as an antiperspirant and in water purification: 

Antiperspirant

Aluminum chlorohydrate is used in over-the-counter deodorants and antiperspirants to reduce underarm sweat and eliminate odors. It works by acting on the stratum corneum layer of the skin. 

Water purification

Aluminum chlorohydrate is used as a coagulant in water purification to improve water quality. It's more efficient than other metal-based coagulants and produces less sludge and alkalinity removal. 

Other uses

Aluminum chlorohydrate can also be used for phosphorus removal, sludge treatment, and heavy metal removal. 

Aluminum chlorohydrate can react with certain substances, including: 

Chemical bases: Neutralizes bases like amines and inorganic hydroxides

Active metals: Corrodes metals like aluminum and iron, releasing hydrogen gas

Cyanide compounds: Releases hydrogen cyanide gas

Dithiocarbamates, isocyanates, mercaptans, nitrides, nitriles, sulfides, and strong reducing agents: May generate flammable or toxic gases

Some serious side effects of topical aluminum chloride include: 

Breathing problems or wheezing

Racing heart

Fever or general ill feeling

Swollen lymph nodes

Swelling of the face, lips, mouth, tongue, or throat

Trouble in swallowing or throat tightness

Itching, skin rash, or pale red bumps on the skin called hives