CAS RN: 7782-50-5

Major Uses

For chlorine (USEPA/OPP Pesticide Code: 020501) ACTIVE products with label matches. /SRP: Registered for use in the U.S. but approved pesticide uses may change periodically and so federal, state and local authorities must be consulted for currently approved uses./
Because of its high toxicity and occurrence of poisoning incidents, the Agency is requiring restricted use status for the non-residential swimming pool use, the industrial food use settings, cooling water towers, and for pulp and paper mill process water systems. Under the provisions of restricted use, only certified applicators or other persons under direct supervision of a certified applicator (40 CFR 171.6) would be able to apply chlorine gas and only for these uses covered by the Certified Applicators certification.
Chlorine's primary use is in polyvinyl chloride (PVC), via ethylene dichloride (EDC) and vinyl chloride monomer (VCM), which accounts for 36% of world consumption. Other main uses are isocyanates and oxygenates, inorganics, chloromethanes/solvents (although this is declining), and epichlorohydrin. Other outlets are in titanium dioxide, pharmaceuticals and agrochemicals, hydrochloric acid, chlorinated rubbers, and pulp and paper production. Chlorine is also used in the control of biofouling in cooling systems, sterilization, and the manufacture of pesticides and refrigerants.
Manufacture of organic and inorganic chemicals. As oxidizing and bleaching agent in pulp and paper industry, and for textiles. As disinfectant for water purification, industrial waste, sewage, swimming pools. In the extraction and refining of metals. (36)Cl for determining geological age of natural samples such as meteorites, surface rocks, polar ice and ground water. Has been used as a military poison gas under the name bertholite.
Used to bleach wood pulp
Manufacture of carbon tetrachloride, trichloroethylene, chlorinated hydrocarbons, polychloroprene (neoprene), polyvinyl chloride, hydrogen chloride, ethylene dichloride, hypochlorous acid, metallic chlorides, chloroacetic acid, chlorobenzene, chlorinated lime; water purification, shrink-proofing wool; flame-retardant compounds; special batteries (with lithium or zinc); processing of meat, fish, vegetables, and fruit.
/Currently and/or formerly used in/ manufacture of carbon tetrachloride, ethylene and propylene oxides, glycols, trichloroethylene, perchloroethylene, chloroform, vinylidene chloride, polychloroprene, hydrogen chloride, metal chlorides, chloracetic acid, chloral, synthetic glycerine, methyl chlorides, chlorinated benzenes, tetraethyl lead, fluorine compounds, titanium tetrachloride, monochloroacetic acid, phosgene, chloroisocyanuric acid, phosphorus chloride, dichlorobutene, and chlorinated paraffins.
For the treatment of flour.
Chlorine gas is used in water treatment to disinfect drinking water, swimming pools, ornamental ponds and aquaria, sewage and wastewater, and other types of water reservoirs. Chlorine gas also is used as a disinfectant, microbistat/microbicide and algicide in food processing systems, pulp and paper mill systems, and commercial and industrial water cooling systems. It is used in washing meat, fresh produce and seeds to control decay-causing microorganisms.
Agent used to control biofouling in cooling systems.
Fungicidal foot baths, root canal or tooth extraction, irrigation, or wound sterilization. /Minor uses/
Aqueous chlorine is effective in reducing surface spoilage bacterial counts on carcasses of slaughter animals and is presently being used for washing beef, pork, lamb, and poultry in some plants under interim authorization.
Chlorine gas was used as a chemical warfare agent during World War I... /Former Use/
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