Soap is the general name of fatty acid metal salts. The general formula is RCOOM, RCOO is fatty acid and M is metal ion. The number of fatty acid carbon in daily soap is generally 10-18. The metal is mainly sodium or potassium and other alkali metals. It is also used for special use soap, such as ammonia and some organic bases, such as ethanolamine and triethanolamine. In general, fatty acids, such as oils, waxes, rosin or fatty acids and alkaloids, which are saponified or neutralized, can be called soap. Soap can be dissolved in water, and it has the function of washing and decontamination. Soap has all kinds of soap, also known as toilet soap, metal soap and composite soap. Soap is the general name of fatty acid metal salts, the number of fatty acid carbon in daily soap is generally 10-18, metal is mainly sodium or potassium and other alkali metals, but also useful for ammonia and some organic bases such as ethanolamine, triethanolamine and other special use soap. Soap includes laundry soap, soap, metal soap, liquid soap, and related products such as fatty acids, hardened oil, glycerin, etc. The composition of soap: sodium salt R-CO2Na of carboxylic acid, synthetic pigment, synthetic perfume, antiseptic, antioxidant, foaming agent, sclerosing agent, thickener, synthetic surfactant. The main component of soap R-CO2Na (sodium stearate) (C17H35COONa), R group is generally different, is a variety of hydrocarbon groups. R- is a hydrophobic group, and the carboxyl group is a hydrophilic group.
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