C.I. Acid Yellow 23

• Catalog Number: ACM1934210-1
• CAS: 1934-21-0
• 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
• Actives: 95%
• Physical State: Solid
• Typical Applications: Coloring agent