citric acid

a white, crystalline, water-soluble powder, C6H8O7·H2O, a tribasic acid having a strong acidic taste, an intermediate in the metabolism of carbohydrates occurring in many fruits, esp. limes and lemons, obtained chiefly by fermentation of crude sugar or corn sugar: used chiefly in the flavoring of beverages, confections, and pharmaceuticals.
[1805-15]

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Colourless, crystalline organic compound (C6H8O7), one of the carboxylic acids.

It is present in almost all plants (especially citrus fruits) and in many animal tissues and fluids. It is one of a series of compounds involved in the physiological oxidation (see oxidation-reduction) of fats, proteins, and carbohydrates to carbon dioxide and water (see tricarboxylic acid cycle). It has a characteristic sharply sour taste and is used in many foods, confections, and soft drinks. It is added to certain foods to improve their stability in metal containers. Industrially, it is used as a water conditioner, cleaning and polishing agent, and chemical intermediate.

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      a colourless, crystalline organic compound belonging to the family of carboxylic acids, present in practically all plants and in many animal tissues and fluids. It is one of a series of compounds involved in the physiological oxidation of fats, proteins, and carbohydrates to carbon dioxide and water (see tricarboxylic acid cycle).

      First isolated from lemon juice by a Swedish chemist, Carl Wilhelm Scheele (Scheele, Carl Wilhelm), in 1784, citric acid is manufactured by fermentation of cane sugar or molasses in the presence of a fungus, Aspergillus niger. It is used in confections and soft drinks (as a flavouring agent), in metal-cleaning compositions, and in improving the stability of foods and other organic substances (by suppressing the deleterious action of dissolved metal salts).

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Universalium. 2010.

Look at other dictionaries:

  • Citric acid — Citric Cit ric, a. [Cf. F. citrique. See {Citron}.] (Chem.) Of, pertaining to, or derived from, the citron or lemon; as, citric acid. [1913 Webster] {Citric acid} (Chem.), an organic acid, {C3H4OH.(CO2H)3}, extracted from lemons, currants,… …   The Collaborative International Dictionary of English

  • citric acid — ► NOUN ▪ a sharp tasting acid present in the juice of lemons and other sour fruits. DERIVATIVES citrate noun …   English terms dictionary

  • Citric acid — E330 redirects here. For the locomotive, see FS Class E330. Citric acid …   Wikipedia

  • citric acid — 2 Hydroxypropane 1,2,3 tricarboxylic acid; the acid of citrus fruits, widely distributed in nature and a key intermediate in intermediary metabolism. * * * cit·ric acid .si trik n a sour organic acid C6H8O7 occurring in cellular metabolism,… …   Medical dictionary

  • citric acid — noun A colourless crystalline compound, 2 hydroxy 1,2,3 propanetricarboxylic acid, CHO, found in citrous fruit; it is used as a food additive and in the manufacture of citrates. Syn: E330, antioxidant See Also …   Wiktionary

  • citric acid — [[t]sɪ̱trɪk æ̱sɪd[/t]] N UNCOUNT Citric acid is a weak acid found in many kinds of fruit, especially citrus fruit such as oranges and lemons …   English dictionary

  • citric acid — an organic acid found naturally in citrus fruits. Citric acid is formed in the first stage of the Krebs cycle, the important energy producing cycle in the body …   The new mediacal dictionary

  • citric acid — citrinų rūgštis statusas T sritis chemija formulė HOC(COOH)(CH₂COOH)₂ atitikmenys: angl. citric acid; lemon acid rus. лимонная кислота ryšiai: sinonimas – 2 hidroksi 1,2,3 propantrikarboksirūgštis …   Chemijos terminų aiškinamasis žodynas

  • citric acid — /sɪtrɪk ˈæsəd / (say sitrik asuhd) noun an organic acid containing three carboxyl groups, C6H8O7, occurring in small amounts in almost all living cells as a component of the tricarboxylic acid cycle, and in greater amounts in many fruits,… …   Australian English dictionary

  • citric acid — noun a weak water soluble acid found in many fruits (especially citrus fruits); used as a flavoring agent • Derivationally related forms: ↑citrate • Hypernyms: ↑acid • Substance Holonyms: ↑sour salt …   Useful english dictionary

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