Ponceau 4R

CAS Registry Number®

2611-82-7
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CAS Name

Ponceau 4R

Molecular Formula

C20H14N2O10S3.3Na

Cite this Page

Ponceau 4R.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=2611-82-7 (retrieved 2021-10-19) (CAS RN: 2611-82-7).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Other Names and Identifiers

InChI

InChI=1S/C20H14N2O10S3.3Na/c23-16-7-5-11-9-12(33(24,25)26)10-18(35(30,31)32)19(11)20(16)22-21-15-6-8-17(34(27,28)29)14-4-2-1-3-13(14)15;;;/h1-10,23H,(H,24,25,26)(H,27,28,29)(H,30,31,32);;;

InChIKey

InChIKey=JLNHICQMWZYSRJ-UHFFFAOYSA-N

SMILES

N(=NC=1C2=C(C(S(=O)(=O)O)=CC1)C=CC=C2)C=3C4=C(C=C(S(=O)(=O)O)C=C4S(=O)(=O)O)C=CC3O.[Na]

Canonical SMILES

[Na].O=S(=O)(O)C1=CC2=CC=C(O)C(N=NC3=CC=C(C=4C=CC=CC34)S(=O)(=O)O)=C2C(=C1)S(=O)(=O)O

Other Names for this Substance

  • 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[2-(4-sulfo-1-naphthalenyl)diazenyl]-, sodium salt (1:3)
  • C.I. Acid Red 18
  • Ponceau 4R
  • C.I. Acid Red 18, trisodium salt
  • 1,3-Naphthalenedisulfonic acid, 7-hydroxy-8-[(4-sulfo-1-naphthalenyl)azo]-, trisodium salt

Deleted or Replaced CAS Registry Numbers

11138-24-2, 12000-58-7, 39470-82-1, 39471-00-6, 51811-48-4, 161628-34-8, 247151-36-6