Direct Red 81

CAS Registry Number®

2610-11-9

CAS Name

Direct Red 81

Molecular Formula

C29H21N5O8S2.2Na

Cite this Page

Direct Red 81.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=2610-11-9 (retrieved 2024-11-24) (CAS RN: 2610-11-9).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Melting Point (1)

    240 °C (decomp)

Source(s)

  • (1) PhysProp data were obtained from Syracuse Research Corporation of Syracuse, New York (US)

Other Names and Identifiers

InChI

InChI=1S/C29H21N5O8S2.2Na/c35-28-25-15-12-23(30-29(36)18-4-2-1-3-5-18)16-19(25)17-26(44(40,41)42)27(28)34-33-21-8-6-20(7-9-21)31-32-22-10-13-24(14-11-22)43(37,38)39;;/h1-17,35H,(H,30,36)(H,37,38,39)(H,40,41,42);;

InChIKey

InChIKey=UGAKDASQLXZVMN-UHFFFAOYSA-N

SMILES

OC=1C2=C(C=C(S(=O)(=O)O)C1N=NC3=CC=C(N=NC4=CC=C(S(=O)(=O)O)C=C4)C=C3)C=C(NC(=O)C5=CC=CC=C5)C=C2.[Na]

Canonical SMILES

[Na].O=C(NC=1C=CC=2C(C1)=CC(=C(N=NC3=CC=C(N=NC4=CC=C(C=C4)S(=O)(=O)O)C=C3)C2O)S(=O)(=O)O)C=5C=CC=CC5

Other Names for this Substance

  • 2-Naphthalenesulfonic acid, 7-(benzoylamino)-4-hydroxy-3-[2-[4-[2-(4-sulfophenyl)diazenyl]phenyl]diazenyl]-, sodium salt (1:2)
  • Chlorantine Fast Red 5B
  • 2-Naphthalenesulfonic acid, 7-(benzoylamino)-4-hydroxy-3-[[4-[(4-sulfophenyl)azo]phenyl]azo]-, disodium salt
  • C.I. Direct Red 81
  • C.I. 28160

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Deleted or Replaced CAS Registry Numbers

12237-71-7, 134092-10-7

CAS INSIGHTSTM
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