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A hand antiseptic, hand disinfectant, hand sanitiser or hand sanitizer is a supplement or alternative to hand washing with soap and water. Many preparations are available, including gel, foam, and liquid solutions.
Sanitation can be carried out by adding chemicals or by subjecting pool water to ultra-violet (UV) light. Common sanitizing chemicals include the traditional chlorine-based sanitizers, chlorine generated from salt in saltwater pools, bromine-based sanitizers, copper and silver ions, and ozone gas.