Congo red

CAS Registry Number®

573-58-0

CAS Name

Congo red

Molecular Formula

C32H24N6O6S2.2Na

Cite this Page

Congo red.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=573-58-0 (retrieved 2024-11-24) (CAS RN: 573-58-0).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Compound Properties

  • Melting Point (1)

    >360 °C

Source(s)

  • (1) Hazardous Substances Data Bank data were obtained from the National Library of Medicine (US)

Other Names and Identifiers

InChI

InChI=1S/C32H24N6O6S2.2Na/c33-31-25-7-3-1-5-23(25)29(45(39,40)41)17-27(31)37-35-21-13-9-19(10-14-21)20-11-15-22(16-12-20)36-38-28-18-30(46(42,43)44)24-6-2-4-8-26(24)32(28)34;;/h1-18H,33-34H2,(H,39,40,41)(H,42,43,44);;

InChIKey

InChIKey=ZADMRLXZHUPGBF-UHFFFAOYSA-N

SMILES

S(=O)(=O)(O)C=1C2=C(C(N)=C(N=NC3=CC=C(C=C3)C4=CC=C(N=NC5=C(N)C6=C(C(S(=O)(=O)O)=C5)C=CC=C6)C=C4)C1)C=CC=C2.[Na]

Canonical SMILES

[Na].O=S(=O)(O)C1=CC(N=NC=2C=CC(=CC2)C3=CC=C(N=NC=4C=C(C=5C=CC=CC5C4N)S(=O)(=O)O)C=C3)=C(N)C=6C=CC=CC61

Other Names for this Substance

  • 1-Naphthalenesulfonic acid, 3,3′-[[1,1′-biphenyl]-4,4′-diylbis(2,1-diazenediyl)]bis[4-amino-, sodium salt (1:2)
  • C.I. Direct Red 28, disodium salt
  • 1-Naphthalenesulfonic acid, 3,3′-[[1,1′-biphenyl]-4,4′-diylbis(azo)]bis[4-amino-, disodium salt
  • C.I. 22120
  • Atlantic Congo Red

View All

Deleted or Replaced CAS Registry Numbers

550-08-3, 70248-72-5, 87440-95-7, 1000818-40-5

CAS INSIGHTSTM
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