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单词 stearic acid
释义

stearic acid


stearic acid

n. A colorless, odorless, waxlike, saturated fatty acid, C18H36O2, occurring in natural animal and vegetable fats and used in making soaps, candles, lubricants, and other products.

stearic acid

n (Elements & Compounds) a colourless odourless insoluble waxy carboxylic acid used for making candles and suppositories; octadecanoic acid. Formula: CH3(CH2)16COOH. See also stearin2

ste•ar′ic ac′id

(stiˈær ɪk, ˈstɪər ɪk)
n. a colorless, waxlike, sparingly water-soluble fatty acid, C18H36O2, occurring in animal fats and some vegetable oils: used in cosmetics and medicine. [1825–35; < Greek stéar fat]
Thesaurus
Noun1.stearic acid - a waxy saturated fatty acid; occurs widely as a glyceride in animal and vegetable fatsoctadecanoic acidsaturated fatty acid - a fatty acid whose carbon chain cannot absorb any more hydrogen atoms; found chiefly in animal fats
Translations

Stearic Acid


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.

stearic acid


stearic acid

 [ste-ar´ik] a saturated fatty acid from animal and vegetable fats, used as a tablet and capsule lubricant and as an emulsifying and solubilizing agent.

ste·ar·ic ac·id

(stē'ă-rik as'id), A saturated 18-carbon fatty acid, one of the most abundant found in animal lipids; used in pharmaceutical preparations, ointments, soaps, and suppositories.

stearic acid

n. A colorless, odorless, waxlike, saturated fatty acid, C18H36O2, occurring in natural animal and vegetable fats and used in making soaps, candles, lubricants, and other products.

ste·ar·ic ac·id

(stē'ă-rik as'id) One of the most abundant acids found in animal lipids; used in pharmaceutical preparations, ointments, soaps, and suppositories.

stearic acid

a saturated fatty acid having 18 carbon atoms, which occurs in animal fat.

stearic acid


  • noun

Synonyms for stearic acid

noun a waxy saturated fatty acid

Synonyms

  • octadecanoic acid

Related Words

  • saturated fatty acid
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