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CAS No 81-11-8 , 5-amino-2-[(E)-2-(4-amino-2-sulfophenyl)ethenyl]benzenesulfonic acid

  • Name: 5-amino-2-[(E)-2-(4-amino-2-sulfophenyl)ethenyl]benzenesulfonic acid
  • Synonyms: Tinopal BHS;Amsonsaeure; Diaminostilbenedisulfonic acid; DASD; Flavonic acid;5-amino-2-[(E)-2-(4-amino-2-sulfophenyl)ethenyl]benzenesulfonic acid; 81-11-8; 4,4'-Diaminostilbene-2,2'-disulfonic acid;
  • CAS Registry Number:
  • Transport: UN 2583
  • Melting Point: >325 ºC
  • Density: 1.662 g/cm3
  • Refractive index: 1.726
  • Water Solubility: <0.1 G/100 ML AT 23 ºC
  • Safety Statements: R34
  • Hazard Symbols: C: Corrosive;
  • EINECS: 201-325-2
  • Molecular Weight: 370.40076
  • InchiKey: REJHVSOVQBJEBF-OWOJBTEDSA-N
  • InChI: InChI=1S/C14H14N2O6S2/c15-11-5-3-9(13(7-11)23(17,
    18)19)1-2-10-4-6-12(16)8-14(10)24(20,21)22/h1-8H,15-16H2,(H,17,18,19)(H,
    20,21,22)/b2-1+
  • Risk Statements: S22;S26;S36/37/39;S45
  • Molecular Formula: C14H14N2O6S2
  • Molecular Structure:CAS No:81-11-8 5-amino-2-[(E)-2-(4-amino-2-sulfophenyl)ethenyl]benzenesulfonic acid

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References of 5-amino-2-[(E)-2-(4-amino-2-sulfophenyl)ethenyl]benzenesulfonic acid
Title: Amsonic Acid
CAS Registry Number: 81-11-8
CAS Name: 2,2￠-(1,2-Ethenediyl)bis[5-aminobenzenesulfonic acid]
Synonyms: 4,4￠-diamino-2,2￠-stilbenedisulfonic acid
Molecular Formula: C14H14N2O6S2
Molecular Weight: 370.40
Percent Composition: C 45.40%, H 3.81%, N 7.56%, O 25.92%, S 17.31%
Literature References: Prepn: Bender, Schultz, Ber. 19, 3234 (1886); H. E. Fierz-David, L. Blangey, Grundlegende Operationen der Farbenchemie (Springer-Verlag, Vienna, 7th ed., 1947) p 161; Spiegler, US 2784220 (1957 to du Pont).
Properties: Yellow needles; very slightly sol in water. Forms sparingly water-sol, crystalline salts with many bisquaternary ammonium bases.
Use: In manuf of dyes, bleaching agents.