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CAS No 536-08-3 , 3,4-dihydroxy-5-(3,4,5-trihydroxybenzoyl)oxybenzoic acid

  • Name: 3,4-dihydroxy-5-(3,4,5-trihydroxybenzoyl)oxybenzoic acid
  • Synonyms: CHEBI:30814; Gallic acid; 536-08-3; NSC59263;m-Digallic acid; 3-gallate;3,4-dihydroxy-5-(3,4,5-trihydroxybenzoyl)oxybenzoic acid; NSC 59263; m-Galloylgallic acid; Gallic acid 3-monogallate;
  • CAS Registry Number:
  • Flash Point: 278°C
  • Boiling Point: 727.8°C at 760 mmHg
  • Density: 1.815g/cm3
  • Refractive index: 1.776
  • Flash Point: 278°C
  • EINECS: 208-624-7
  • Molecular Weight: 322.2238
  • InchiKey: COVFEVWNJUOYRL-UHFFFAOYSA-N
  • InChI: InChI=1S/C14H10O9/c15-7-2-6(3-8(16)11(7)18)14(22)23-10-4-5(13(20)21)1-9
    (17)12(10)19/h1-4,15-19H,(H,20,21)
  • Molecular Formula: C14H10O9
  • Molecular Structure:CAS No:536-08-3 3,4-dihydroxy-5-(3,4,5-trihydroxybenzoyl)oxybenzoic acid

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536-08-3 DIGALLIC ACID

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536-08-3 DIGALLIC ACID ( 3,4-DIHYDROXY-5-[(3,4,5-TRIHYDROXYBENZOYL)OXY]BENZOIC ACID )

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References of 3,4-dihydroxy-5-(3,4,5-trihydroxybenzoyl)oxybenzoic acid
Title: Digallic Acid
CAS Registry Number: 536-08-3
CAS Name: 3,4-Dihydroxy-5-[(3,4,5-trihydroxybenzoyl)oxy]benzoic acid
Synonyms: gallic acid 5,6-dihydroxy-3-carboxyphenyl ester; 4,5-dihydroxybenzoic acid monogallate; gallic acid 3-monogallate; m-digallic acid; m-galloylgallic acid
Molecular Formula: C14H10O9
Molecular Weight: 322.22
Percent Composition: C 52.18%, H 3.13%, O 44.69%
Literature References: Isoln from Aleppo gallotannin and Chinese gallotannin: Nierensten, Ber. 43, 628 (1910). Synthesis: Fischer, Freudenberg, Ber. 46, 1128 (1913). Structure: Nierenstein et al., J. Am. Chem. Soc. 47, 846 (1925). Determn by HPLC: P. Delahaye, M. Verzele, J. Chromatogr. 265, 363 (1983); in tannic acids: M. Verzele et al., Bull. Soc. Chim. Belg. 92, 181 (1983). Role in corrosion inhibition: A. M. Beccaria, E. D. Mor, Br. Corrosion J. 11, 156 (1976).
Properties: Hydrated needles from alc + water, anhydr at 110°; dec 280°. Sol in 1900 parts water at 25°; in 50-60 parts boiling water; sol in methanol, ethanol, acetone; sparingly sol in ether, glacial acetic acid. Upon addn of KCN to an aq soln a transitory pink color appears, which returns on shaking.
NOTE: In pharmaceutical literature the name digallic acid is frequently confused with tannic acid.