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C.I. Acid Yellow 23

Catalog Number
ACM1934210-1
CAS
1934-21-0
Structure
IUPAC Name
trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4H-pyrazole-3-carboxylate
Synonyms
Acid Yellow 23;Tartrazine;C.I. 19140;1H-Pyrazole-3-carboxylic acid, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-(2-(4-sulfophenyl)diazenyl)-, sodium salt (1:3)
Molecular Weight
534.36
Molecular Formula
C16H9N4Na3O9S2
Canonical SMILES
C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)[O-])C(=O)[O-])S(=O)(=O)[O-].[Na+].[Na+].[Na+]
InChI
UJMBCXLDXJUMFB-UHFFFAOYSA-K
InChI Key
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);;;/q;3*+1/p-3
Melting Point
300 °C
Active Content
95%
Physical State
Solid
Typical Applications
Coloring agent
Spec Sheet
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