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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]
The resulting product can be called oleochemicals (from Latin: oleum "olive oil"). The major product of this industry is soap, approximately 8.9×10 6 tons of which were produced in 1990. Other major oleochemicals include fatty acids, fatty acid methyl esters, fatty alcohols and fatty amines. Glycerol is a side product of all of these processes ...
Depending on the nature of the alkali used in their production, soaps have distinct properties. Sodium hydroxide (NaOH) produces "hard" soaps; hard soaps can also be used in water containing Mg, Cl, and Ca salts. [5] By contrast, potassium soaps (derived using KOH) are "soft" soaps. The fatty acid source also affects the soap's melting point.
Total fatty matter (TFM) is one of the most important characteristics describing the quality of soap and is always specified in commercial transactions. It is defined as the total amount of fatty matter, mostly fatty acids , that can be separated from a sample after splitting with a mineral acid , usually hydrochloric acid .
Sodium cocoate is a mixture of fatty acid salts of coconut oil that is used in some soaps. [1] Sodium cocoate is produced by hydrolysis of the ester linkages in coconut oil with sodium hydroxide, a strong base. The CAS number for sodium cocoate is 61789-31-9.
The fatty acid salts formed during production constitute the actual soap and are effective cleaners due to their surfactant properties. Using soap helps dissolve many water-insoluble substances, like fats and oils, making them washable with water. In most cases, hard soaps or products based on them are used for handwashing because they exhibit ...
Lithium grease in use. Lithium soap is a soap consisting of a lithium salt of a fatty acid. [1] [2] Sodium-based and potassium-based soaps are used as cleaning agents in domestic and industrial applications, whereas lithium soaps are used as components of lithium grease (white lithium).
Glycerol has three hydroxyl functional groups, which can be esterified with one, two, or three fatty acids to form mono-, di-, and triglycerides. [2] These structures vary in their fatty acid alkyl groups as they can contain different carbon numbers, different degrees of unsaturation, and different configurations and positions of olefins. [1]