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Stearic acid is mainly used in the production of detergents, soaps, and cosmetics such as shampoos and shaving cream products. [9] Stearate soap, such as sodium stearate, could be made from stearic acid but instead are usually produced by saponification of stearic acid-containing triglycerides.
Sodium stearate is produced as a major component of soap upon saponification of oils and fats. The percentage of the sodium stearate depends on the ingredient fats. Tallow is especially high in stearic acid content (as the triglyceride), whereas most fats only contain a few percent. The idealized equation for the formation of sodium stearate ...
In this context, soap is used in its formal sense, a metal salt of a fatty acid: in this case stearic acid. It is a white solid that repels water. It is a white solid that repels water. It is insoluble in polar solvents such as alcohol and ether but soluble in aromatic hydrocarbons (e.g., benzene ) and chlorinated hydrocarbons when heated.
A handmade soap bar Two equivalent images of the chemical structure of sodium stearate, a typical ingredient found in bar soaps Emulsifying action of soap on oil. Soap is a salt of a fatty acid (sometimes other carboxylic acids) used for cleaning and lubricating products as well as other applications. [1]
Potassium stearate is a metal-organic compound, a salt of potassium and stearic acid with the chemical formula C 18 H 35 KO 2. The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid. [1] [2]
Calcium stearate is produced by heating stearic acid and calcium oxide: 2 C 17 H 35 COOH + CaO → (C 17 H 35 COO) 2 Ca + H 2 O. It is also the main component of soap scum, a white solid that forms when soap is mixed with hard water. Unlike soaps containing sodium and potassium, calcium stearate is insoluble in water and does not lather well. [2]
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