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CAS No 87-88-7 , 2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione

  • Name: 2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione
  • Synonyms: 2,5-Cyclohexadiene-1,4-dione; NSC 6108; 2,5-dichloro-3,6-dihydroxy-; p-Chloranilic acid;2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione;2,5-Dichloro-3,6-dihydroxy-p-benzoquinone; 87-88-7;
  • CAS Registry Number:
  • Flash Point: 135.4 ºC
  • Boiling Point: 300.3 ºC at 760 mmHg
  • Density: 1.93 g/cm3
  • Refractive index: 1.654
  • Water Solubility: slight
  • Safety Statements: R36/37/38:Irritatingtoeyes,respiratorysystemandskin.;
  • Hazard Symbols: Xi:Irritant;
  • Flash Point: 135.4 ºC
  • EINECS: 201-780-7
  • Molecular Weight: 208.98368
  • InchiKey: IPPWILKGXFOXHO-UHFFFAOYSA-N
  • InChI: InChI=1S/C6H2Cl2O4/c7-1-3(9)5(11)2(8)6(12)4(1)10/h9,12H
  • Risk Statements: S24/25:Avoidcontactwithskinandeyes.;
  • Molecular Formula: C6H2Cl2O4
  • Molecular Structure:CAS No:87-88-7 2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione

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References of 2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione
Title: Chloranilic Acid
CAS Registry Number: 87-88-7
CAS Name: 2,5-Dichloro-3,6-dihydroxy-2,5-cyclohexadiene-1,4-dione
Synonyms: 2,5-dichloro-3,6-dihydroxy-p-benzoquinone
Molecular Formula: C6H2Cl2O4
Molecular Weight: 208.98
Percent Composition: C 34.48%, H 0.96%, Cl 33.93%, O 30.62%
Literature References: Prepd from chloranil by alkaline hydrolysis: Conant, Fieser, J. Am. Chem. Soc. 46, 1866 (1924).
Properties: Red crystals, mp 283-284°. Tendency to sublime. Relatively strong dibasic acid. Absorption max (pH 4 in water): 290-340 nm, 520-555 nm.
Melting point: mp 283-284°
Absorption maximum: Absorption max (pH 4 in water): 290-340 nm, 520-555 nm
Use: Reacts with metal cations to form stable salts. Used in spectrophotometry: Hart, Org. Chem. Bull. 33, no. 3 (1961).