para-aminobenzoic acid

para-aminobenzoic acid
/par"euh euh mee'noh ben zoh"ik, -am'euh noh-/, Chem., Biochem.
part of the folic acid molecule, a white or yellowish, crystalline, slightly water-soluble solid, C7H7NO2, the para isomer of aminobenzoic acid: used chiefly in the manufacture of dyes and pharmaceuticals and in sunscreens to protect against ultraviolet light. Abbr.: PABA
[1905-10; PARA-1 + AMINO- + BENZOIC ACID]

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also called  aminobenzoic acid 

      a vitamin-like substance and a growth factor required by several types of microorganisms. In bacteria, PABA is used in the synthesis of the vitamin folic acid. The drug sulfanilamide is effective in treating some bacterial diseases because it prevents the bacterial utilization of PABA in the synthesis of folic acid.

      PABA is not an essential nutrient for vertebrates, since they do not synthesize their own folic acid. PABA is present in high concentrations in brewer's yeast, and it is perhaps best-known as an ultraviolet screen and as an active ingredient of some sun lotions.

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Universalium. 2010.

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  • para-aminobenzoic acid — [par΄ə ə mē΄nō ben zō′ik, par΄əam΄ə nō΄ben zō′ik] n. [ PARA 1 + AMINO + BENZOIC] a yellowish isomer of aminobenzoic acid, that is a component of folic acid, widely distributed in nature, esp. in yeast, and utilized as a vitamin by organisms that… …   English World dictionary

  • para-aminobenzoic acid — para ami·no·ben·zo·ic acid par ə ə .mē nō .ben .zō ik , par ə .am ə (.)nō n a colorless para substituted aminobenzoic acid that is a growth factor of the vitamin B complex and is used as a sunscreen called also PABA * * * para am·i·no·ben·zo·ic… …   Medical dictionary

  • para-aminobenzoic acid — |parə+... noun Etymology: International Scientific Vocabulary para (I) + aminobenzoic : aminobenzoic acid a written systematically with ital. para or p …   Useful english dictionary

  • para-aminobenzoic acid — noun Etymology: International Scientific Vocabulary Date: 1906 a colorless para substituted aminobenzoic acid that is a growth factor of the vitamin B complex and is used as a sunscreen called also PABA …   New Collegiate Dictionary

  • para aminobenzoic acid — noun a metabolic acid found in yeast and liver cells; used to make dyes and drugs and sun blockers • Syn: ↑PABA • Hypernyms: ↑acid • Substance Holonyms: ↑sunscreen, ↑sunblock, ↑sun blocker …   Useful english dictionary

  • para-aminobenzoic acid — par′a a•mi•no•ben•zo′ic ac′id [[t]ˈpær ə əˌmi noʊ bɛnˈzoʊ ɪk, ˌæm ə noʊ [/t]] n. biochem. chem. a yellowish, crystalline solid, C7H7NO2, that is a component of the vitamin B complex. Abbr.: PABA • Etymology: 1905–10 …   From formal English to slang

  • Aminobenzoic acid — (a benzoic acid with an amino group) can refer to:* para Aminobenzoic acid ( p aminobenzoic acid) * 3 Aminobenzoic acid ( m aminobenzoic acid) * Anthranilic acid (2 aminobenzoic acid, o aminobenzoic acid) …   Wikipedia

  • aminobenzoic acid — [ə mē΄nō ben zō′ik, am΄i nō΄ben zō′ik] n. any of several crystalline substances with the same formula, NH2C6H4COOH, used in the manufacture of dyes, drugs, suntan lotions, etc.: see also PARA AMINOBENZOIC ACID …   English World dictionary

  • aminobenzoic acid — noun a derivative of benzoic acid • Hypernyms: ↑acid * * *  ̷ ̷| ̷ ̷ ̷ ̷| ̷ ̷| ̷ ̷ ̷ ̷ , | ̷ ̷ ̷ ̷ˌ ̷ ̷| ̷ ̷| ̷ ̷ ̷ ̷ noun Etymology: International Scientific Vocabulary amin + benzoic : any of three crystalline monoamino derivatives NH2C6H4COOH… …   Useful english dictionary

  • aminobenzoic acid — /euh mee noh ben zoh ik, am euh noh , euh mee noh , am euh noh /, Chem. any of three isomers having the formula C7H7NO2, derived from benzoic acid, esp. the para isomer, para aminobenzoic acid. [1900 05; AMINO + BENZOIC ACID] * * * …   Universalium

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