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Tartrazine

Catalog Number DYE-AFC-0002
CAS Number 1934-21-0
Structure
Description Tartrazine is a synthetic tartrazine azo dye used primarily as a food colorant.
Synonyms Yellow 5
IUPAC Name Trisodium 5-hydroxy-1-(4-sulfonatophenyl)-4-[(E)-(4-sulfonatophenyl)diazenyl]-1H-pyrazole-3-carboxylate
Molecular Weight 534.36
Molecular Formula C16H9N4Na3O9S2
Canonical SMILES [Na+].[Na+].[Na+].[O-]S(=O)(=O)c1ccc(cc1)/N=N/c3c(nn(c2ccc(cc2)S([O-])(=O)=O)c3O)C([O-])=O
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;;;/h1-8,21H,(H,22,23)(H,24,25,26)(H,27,28,29);;;/q;3*+1/p-3/b18-17+;;;
InChI Key YXHBBEQKMVAJOH-GLCFPVLVSA-K
Solubility 20 g/100 mL in water. 18 g/100 mL in glycerol, negligible in ethanol.
Application Tartrazine is a commonly used colorant throughout the world, primarily for yellow. It is used as a dye for wool and silk, a colorant in food, medicine, and cosmetics, and an adsorption elution indicator for chloride estimation in biochemistry.
CI Number C.I. 19140
E Number E102

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