Answer: CHLORIN

AnswerCrossword Clue
CHLORINElement used in purifying water.
CHLORINBleaching agent.
chlorina halogen element that is isolated as a heavy greenish-yellow diatomic gas of pungent odor and is used especially as a bleach, oxidizing agent, and disinfectant in water purification see element table
chlorina gaseous element, also CHLORINE