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CAS No 81-77-6 , Vat Blue 4

  • Name: Vat Blue 4
  • Synonyms: Indanthrene; Vat blue 4;Indanthrone; Indanthren Blue;Vat Blue 4; Indanthrene Blue; Medium Blue; C.I. Vat Blue 4; Anthraquinone Blue; Lutetia Fast Blue RS;
  • CAS Registry Number:
  • Transport: CB8761100
  • Melting Point: 470-500 ºC
  • Flash Point: 253.9 ºC
  • Boiling Point: 740.2 ºC at 760 mmHg
  • Density: 1.487 g/cm3
  • Refractive index: 1.746
  • Water Solubility: <0.1 G/100 ML AT 21 ºC
  • Safety Statements: 22-36/37/39
  • Flash Point: 253.9 ºC
  • EINECS: 201-375-5
  • Molecular Weight: 442.42176
  • InchiKey: UHOKSCJSTAHBSO-UHFFFAOYSA-N
  • InChI: InChI=1S/C28H14N2O4/c31-25-13-5-1-3-7-15(13)27(33)21-17(25)9-11-19-23
    (21)29-20-12-10-18-22(24(20)30-19)28(34)16-8-4-2-6-14(16)26(18)32/h1-12,
    29-30H
  • Risk Statements: 20/21/22
  • Molecular Formula: C28H14N2O4
  • Molecular Structure:CAS No:81-77-6 Vat Blue 4

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References of Vat Blue 4
Title: Indanthrene
CAS Registry Number: 81-77-6
CAS Name: 6,15-Dihydro-5,9,14,18-anthrazinetetrone
Synonyms: N,N￠-dihydro-1,2,1￠,2￠-anthraquinonazine
Molecular Formula: C28H14N2O4
Molecular Weight: 442.42
Percent Composition: C 76.01%, H 3.19%, N 6.33%, O 14.47%
Literature References: Vat dye discovered by René Bohn (1901). Prepn: Fierz-David, Blangey, Grundlegende Operationen der Farbenchemie (Vienna, 5th ed., 1943) pp 304-305; Thielert, Bauman, US 2693469 (1954 to Bayer); Sutter, Fioroni, US 2831860 (l958 to Ciba); Kastner, US 3138612 (1964 to Allied Chem.). Structure: Weinstein, Merrit, J. Am. Chem. Soc. 81, 3759 (1959).
Properties: Blue powder, dec 470-500°. uv max on cellophane film: 278 nm. Practically insol in organic solvents. Sol in concd H2SO4, in dil alkali solns. Indanthrene Blue R, the usual commercial grade, is extremely stable to light and heat, but sensitive to chlorine. A purer grade, which is not as sensitive to chlorine, is sold as Indanthrene Brilliant Blue FF.
Absorption maximum: uv max on cellophane film: 278 nm
Use: Mainly to dye cotton.