Also known as sodium hypochlorite, hypochlorite, chlorine dioxide, sodium dichloroixocyanurate, hydrogen chloride, and hydrochloric acid.

Powerful irritant. Can be fatal upon inhalation. Causes the most household poisonings in the U.S., and ranks first in industrial injuries and deaths.There is growing evidence that chlorinated drinking water causes bladder cancer and rectal cancer. Many chlorinated water supplies probably contain some amount of THM (trihalomethanes), which are carcinogenic compounds. THMs can be removed from tap water with an adequate home filtration system with activated carbon. Chlorine and compounds are environmentally damaging, break down slowly in the ecosystem, are stored in the fatty tissue of wildlife, and are a prime cause of atmospheric ozone loss. Chlorine is listed in the 1990 Clean Air Act as a hazardous air pollutant. Found in a wide range of household cleaners, including laundry bleaches, dishwasher detergents, and tub and tile cleaners.