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Stearic Acid |
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stearic acid [′stir·ik ′as·əd]
(organic chemistry) CH3(CH2)16COOH Nature's most common fatty acid, derived from natural animal and vegetable fats; colorless, waxlike solid, insoluble in water, soluble in alcohol, ether, and chloroform; melts at 70°C; used as a lubricant and in pharmaceuticals, cosmetics, and food packaging. Stearic Acid (also n-octadecanoic acid), CH3(CH2)16COOH, a monobasic saturated aliphatic carboxylic acid. The acid takes the form of colorless crystals and has a melting point of 69.6°C and a boiling point of 376.1°C. It is insoluble in water but soluble in ether. Stearic acid is one of the most common higher fatty acids in nature; glycerides of stearic acid are the main component of many fats and oils, from which stearic acid is isolated by hydrolysis, usually in the form of stearin—a mixture of stearic and palmitic acids. Stearic acid may be obtained by fractional precipitation or distillation from stearin and by the hydrogenation of oleic acid. Alkali salts of stearic acid are soaps. Pure stearic acid is used in organic synthesis and in analytical chemistry, where it serves to identify Ca, Mg, and Li, while technical-grade acid is used as a dispersing agent of the ingredients and a vulcanization activator in the production of rubber. The stearates of sodium, lithium, calcium, lead, and other metals are used as constituents of lubricating greases. Stearic acid and its esters are used in the production of cosmetics. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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No references found | The formulation is comprised of sodium lauroyl isethionate, a mild cleanser that reduces protein damage, and 100percent natural moisturizers, including stearic acid, soybean oil and glycerin, that fully absorb into skin to replenish lipids lost during cleansing. Tools and cleaning materials for "pristine" cleaning of a screw and barrel are few and simple: high-heat gloves, safety glasses, a brass putty knife, brass wire brush, copper gauze, stearic acid flakes, an electric drill, cotton rags, and a round brass wire brush about the ID of the barrel, mounted on a rod as long as the barrel. Stearic acid is a saturated fatty acid, mostly found in chocolate and cocoa butter. |
Stearic Acid |
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