3-Hydroxy-4-(2-hydroxy-1-naphthylazo)-1-naphthalenesulfonic acid

CAS Registry Number®

2538-79-6

CAS Name

3-Hydroxy-4-(2-hydroxy-1-naphthylazo)-1-naphthalenesulfonic acid

Molecular Formula

C20H14N2O5S

Molecular Mass

394.40

Cite this Page

3-Hydroxy-4-(2-hydroxy-1-naphthylazo)-1-naphthalenesulfonic acid.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=2538-79-6 (retrieved 2025-08-03) (CAS RN: 2538-79-6).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Other Names and Identifiers

InChI

InChI=1S/C20H14N2O5S/c23-16-10-9-12-5-1-2-6-13(12)19(16)21-22-20-15-8-4-3-7-14(15)18(11-17(20)24)28(25,26)27/h1-11,23-24H,(H,25,26,27)

InChIKey

InChIKey=ZMLWOOMWRCRLCH-UHFFFAOYSA-N

SMILES

N(=NC=1C2=C(C=CC1O)C=CC=C2)C=3C4=C(C(S(=O)(=O)O)=CC3O)C=CC=C4

Canonical SMILES

O=S(=O)(O)C1=CC(O)=C(N=NC2=C(O)C=CC=3C=CC=CC32)C=4C=CC=CC41

Other Names for this Substance

  • 1-Naphthalenesulfonic acid, 3-hydroxy-4-[2-(2-hydroxy-1-naphthalenyl)diazenyl]-
  • 1-Naphthalenesulfonic acid, 3-hydroxy-4-[(2-hydroxy-1-naphthalenyl)azo]-
  • C.I. Mordant Black 17, free acid
  • Solochrome Dark Blue B, free acid
  • 3-Hydroxy-4-[2-(2-hydroxy-1-naphthalenyl)diazenyl]-1-naphthalenesulfonic acid

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CAS INSIGHTSTM
This is the vasculature of an actual heart (porcine heart, identical to human heart).