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CAS No 319-89-1 , 2,3,5,6-tetrahydroxycyclohexa-2,5-diene-1,4-dione

  • Name: 2,3,5,6-tetrahydroxycyclohexa-2,5-diene-1,4-dione
  • Synonyms: 319-89-1;2,3,5,6-tetrahydroxycyclohexa-2,5-diene-1,4-dione; Kelox; HPEK-1; Tetrahydroxy-1,4-benzoquinone;tetroquinone; Tetrahydroxy-p-quinone; Tetrahydroxyquinone;
  • CAS Registry Number:
  • Melting Point: 300 deg C
  • Density: 2.609 g/cm3/sup>
  • Refractive index: 2.023
  • Water Solubility: Slightly soluble in cold water
  • Safety Statements: R36/37/38
  • Hazard Symbols: Xi: Irritant;
  • EINECS: 206-275-5
  • Molecular Weight: 172.09236
  • InchiKey: DGQOCLATAPFASR-UHFFFAOYSA-N
  • InChI: InChI=1S/C6H4O6/c7-1-2(8)4(10)6(12)5(11)3(1)9/h7-8,11-12H
  • Risk Statements: S26;S36
  • Molecular Formula: C6H4O6
  • Molecular Structure:CAS No:319-89-1 2,3,5,6-tetrahydroxycyclohexa-2,5-diene-1,4-dione

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References of 2,3,5,6-tetrahydroxycyclohexa-2,5-diene-1,4-dione
Title: Tetroquinone
CAS Registry Number: 319-89-1
CAS Name: 2,3,5,6-Tetrahydroxy-2,5-cyclohexadiene-1,4-dione
Synonyms: tetrahydroxy-p-benzoquinone; tetrahydroxyquinone; THQ
Manufacturers' Codes: HPEK-1; NSC-112931
Molecular Formula: C6H4O6
Molecular Weight: 172.09
Percent Composition: C 41.88%, H 2.34%, O 55.78%
Literature References: Prepn from glyoxal: A. J. Fatiadi, W. F. Sager, Org. Synth. coll. vol. V, 1011 (1973). Clinical evaluation for ophthalmic fibrosis: R. Ching, Eye Ear Nose Throat Mon. 50, 101, 144 (1971).
Properties: Dark, odorless, tasteless crystals with blue-black metallic luster in reflected light. mp 280°. Sol (1:200) in cold water; sol (1:100) in hot water or in alcohol; slightly sol in ether. It acts like a strong dibasic acid.
Melting point: mp 280°
 
Derivative Type: Disodium salt
Molecular Formula: Na2C6H2O6
Molecular Weight: 216.06
Percent Composition: Na 21.28%, C 33.35%, H 0.93%, O 44.43%
Properties: Almost black crystals with a green metallic luster, sparingly sol in water.
 
Use: Disodium salt is used as an indicator in the volumetric determination of sulfate by means of barium chloride solution.