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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.
1 Disinfection: a process of possibly killing or reducing growth of microbes on a non-living surface. 2  Sanitization: any cleaning technique that removes dirt and usually microbes.  Antisepsis: a process of killing or reducing growth of microbes on living tissue.