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CAS No 148-25-4 , 4,5-dihydroxynaphthalene-2,7-disulfonic acid

  • Name: 4,5-dihydroxynaphthalene-2,7-disulfonic acid
  • Synonyms: Chromotropic acid; 4,5-dihydroxynaphthalene-2,7-disulfonic acid;4,5-dihydroxynaphthalene-2,7-disulfonic acid; 148-25-4; CHEBI:1751; 4,5-Dihydroxy-2,7-naphthalenedisulfonic acid;
  • CAS Registry Number:
  • Density: 1.929 g/cm3
  • Refractive index: 1.756
  • EINECS: 205-712-7
  • Molecular Weight: 320.29572
  • InchiKey: HLVXFWDLRHCZEI-UHFFFAOYSA-N
  • InChI: InChI=1S/C10H8O8S2/c11-8-3-6(19(13,14)15)1-5-2-7(20(16,
    17)18)4-9(12)10(5)8/h1-4,11-12H,(H,13,14,15)(H,16,17,18)
  • Molecular Formula: C10H8O8S2
  • Molecular Structure:CAS No:148-25-4 4,5-dihydroxynaphthalene-2,7-disulfonic acid

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148-25-4 1,8-Dihydroxynaphthylene-3,6-disulfonic acid

  • Name:1,8-Dihydroxynaphthylene-3,6-disulfonic acid Synonym:4,5-dihydroxy-7-naphthalenedisulfonicacid;7-Naphthalenedisulfonicacid,4,5-dihydroxy-2;Chrmotropicacid;4,5-DIHYDROXY-2,7-NAPHTHALENEDISULFONIC ACID;4,5-dihydroxynaphthalene-2,7-disulphonic acid...
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    148-25-4 Chromotropic Acid

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    References of 4,5-dihydroxynaphthalene-2,7-disulfonic acid
    Title: Chromotropic Acid
    CAS Registry Number: 148-25-4
    CAS Name: 4,5-Dihydroxy-2,7-naphthalenedisulfonic acid
    Synonyms: 1,8-dihydroxynaphthalene-3,6-disulfonic acid
    Molecular Formula: C10H8O8S2
    Molecular Weight: 320.30
    Percent Composition: C 37.50%, H 2.52%, O 39.96%, S 20.02%
    Literature References: Prepn from 4-chloro-5-hydroxy-2,7-naphthalenedisulfonic acid: DE 147852 (1904 to BASF); alternate methods: Frdl. 3, 460-466.
     
    Derivative Type: Dihydrate
    Properties: White needles, soluble in water.
     
    Derivative Type: Disodium salt dihydrate
    Molecular Formula: C10H6Na2O8S2.2H2O
    Molecular Weight: 400.29
    Percent Composition: C 30.00%, H 2.52%, Na 11.49%, O 39.97%, S 16.02%
    Properties: White needles or leaflets. Very sol in water.
     
    Use: Analytical reagent; intermediate for azo dyes.