CAS # 7782-50-5 NIOSH IDHL 25 ppm NIOSH Ceiling 0.5ppm/15 minutes PEL/TWA 1 ppm TLV/TWA 1 ppm TLV/STEL 3 ppm TLV/IDLH 25 ppm

Chlorine is a greenish-yellow gas with a strong irritating smell. Chlorine is not flammable. It is used as a bleach and water purifier. Also as a germ-killer and disinfectant in homes, hospitals, swimming pools, hotels, restaurants, and other public places.