Tartrazine is a synthetic lemon yellow azo dye primarily used as a food coloring. It is also known as E number E102 C.I. 19140 FD&C Yellow 5 Acid Yellow 23 Food Yellow 4 and Trisodium 1-(4-sulfonatophenyl)-4-(4-sulfonatophenylazo)-5-pyrazolone-3-carboxylate).Tartrazine is a synthetic organic chemical.
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