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is a liquid or gel that is usually used to reduce pathogens against the hands. The use of alcohol-based hand sanitizer is preferable to cleaning hands using soap and water against a variety of situations in the health service area. Hand sanitizer is usually more efficient at killing microorganisms and is more tolerated by hands than soap and water. However, hand cleaning must always be done if contamination can be seen or after using the toilet.
Nonalcohol-based hand sanitizer is not recommended for general use. Outside the health service area, the effectiveness of using hand sanitizer as a substitute for hand washing cannot be supported by good evidence. Hand sanitizer is available in the form of liquids, gels, and foams.
Alcohol-based hand sanitizer usually contains a partial content of combined isopropyl alcohol, ethanol (ethyl alcohol), or n-propanol. Alcohol content of 60 to 95% proved most effective. However, its use must be vigilant because it is flammable. Alcohol-based hand sanitizer is efficient against a variety of microorganisms but not for spores. Some models of hand sanitizers contain compounds such as glycerol to avoid dry skin. Nonalcoholic types can contain benzalkonium chloride or triclosan.
Alcohol was already used as an antiseptic at least against the early 1363s along with evidence of its use against the late 1800s. Alcohol-based hand sanitizer has been commonly used in Europe since the 1980s. Alcohol-based hand sanitizers are listed on the World Health Organization's List of Essential Medicines, and are the safest and most efficient medicines needed in the health system. Wholesale prices in developing countries range from US$1.40-3.70 per litre bottle.