1. Water disinfection: Chlorine is the most widely used disinfectant for public water supplies. It kills bacteria, viruses, and other harmful microorganisms, making water safe to drink.

2. Bleach production: Chlorine is a key ingredient in household bleach, which is used for disinfecting surfaces, whitening clothes, and removing stains.

3. Chemical production: Chlorine is a vital raw material in the production of many chemicals, including plastics, pharmaceuticals, pesticides, and solvents.