Tartrazine

CAS Registry Number®

1934-21-0
No image available.

CAS Name

Tartrazine

Molecular Formula

C16H12N4O9S2.3Na

Cite this Page

Tartrazine.   CAS Common Chemistry.   CAS, a division of the American Chemical Society, n.d.   http://commonchemistry.cas.org/detail?cas_rn=1934-21-0 (retrieved 2021-10-22) (CAS RN: 1934-21-0).  Licensed under the Attribution-Noncommercial 4.0 International License (CC BY-NC 4.0).

Other Names and Identifiers

InChI

InChI=1S/C16H12N4O9S2.3Na/c21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;;;/h1-8,13H,(H,22,23)(H,24,25,26)(H,27,28,29);;;

InChIKey

InChIKey=RHKOFJVEQBGAMP-UHFFFAOYSA-N

SMILES

O=C1N(N=C(C(O)=O)C1N=NC2=CC=C(S(=O)(=O)O)C=C2)C3=CC=C(S(=O)(=O)O)C=C3.[Na]

Canonical SMILES

[Na].O=C(O)C1=NN(C(=O)C1N=NC2=CC=C(C=C2)S(=O)(=O)O)C3=CC=C(C=C3)S(=O)(=O)O

Other Names for this Substance

  • 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[2-(4-sulfophenyl)diazenyl]-, sodium salt (1:3)
  • C.I. Acid Yellow 23
  • Tartrazine
  • C.I. Acid Yellow 23, trisodium salt
  • 1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-, trisodium salt

Deleted or Replaced CAS Registry Numbers

117209-34-4, 134240-82-7, 139601-06-2, 642-62-6, 1342-47-8, 1342-53-6, 12000-64-5, 50809-64-8, 84842-94-4, 389057-90-3, 469888-21-9, 154881-98-8, 183808-13-1, 191807-79-1