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CAS No 89-86-1 , 2,4-dihydroxybenzoic acid

  • Name: 2,4-dihydroxybenzoic acid
  • Synonyms: p-Hydroxysalicylic acid; 2,4-dihydroxy-; beta-Resorcinolic acid;2,4-dihydroxybenzoic acid; Benzoic acid; 4-Carboxyresorcinol; 89-86-1; beta-Resorcylic acid;
  • CAS Registry Number:
  • Melting Point: 225-227 ºC
  • Density: 1.559 g/cm3
  • Water Solubility: 8 G/L (20 ºC)
  • Safety Statements: R36/37/38
  • Hazard Symbols: Xi: Irritant;
  • HS Code: 29182990
  • EINECS: 201-946-9
  • Molecular Weight: 154.12014
  • InchiKey: UIAFKZKHHVMJGS-UHFFFAOYSA-N
  • InChI: InChI=1S/C7H6O4/c8-4-1-2-5(7(10)11)6(9)3-4/h1-3,8-9H,(H,10,11)
  • Risk Statements: S26;S37/39
  • Molecular Formula: C7H6O4
  • Molecular Structure:CAS No:89-86-1 2,4-dihydroxybenzoic acid

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References of 2,4-dihydroxybenzoic acid
Title: b-Resorcylic Acid
CAS Registry Number: 89-86-1
CAS Name: 2,4-Dihydroxybenzoic acid
Synonyms: 2,4-dihydroxybenzenecarboxylic acid; BRA
Molecular Formula: C7H6O4
Molecular Weight: 154.12
Percent Composition: C 54.55%, H 3.92%, O 41.52%
Literature References: Prepared from resorcinol and KHCO3 in glycerol or water by heating and passing CO2 through the mixture: Brunner, Ann. 351, 320 (1907). Cf. Bistrycki, Kostanecki, Ber. 18, 1984 (1885); Nierenstein, Clibbens, Org. Synth. coll. vol. II, 557 (1943).
Properties: Hydrated crystals from water. Becomes anhydr at 100°, mp 213° (rapid heating). pK (25°) 3.30. Sol in hot water, alcohol, ether, olive oil. Boiling with water, acids or salt solns results in loss of CO2.
Melting point: mp 213° (rapid heating)
pKa: pK (25°) 3.30
Use: Intermediate for dyestuffs and drugs; spot test reagent for iron.