1. 氯气;氯
Chlorine is a strong-smelling gas that is used to clean water and to make cleaning products.

1. a common nonmetallic element belonging to the halogens
best known as a heavy yellow irritating toxic gas
used to purify water and as a bleaching agent and disinfectant
occurs naturally only as a salt (as in sea water)

Synonym: Clatomic number 17