Pecifications
Lemon yellow, Tartrazine, Food additives
Molecular formula: C16H9N4Na3O9S2
MW: 534.390
CAS No.: 1934-21-0
For food, medicine
Lemon yellow, Tartrazine, Food additives
Food lemon yellow; Tartrazine; FD & C Yellow No. 5; C. I. Acid yellow 23; C. I. Food yellow 4(19140); Hydrazine yellow
Molecular formula: C16H9N4Na3O9S2
MW: 534.390
CAS No.: 1934-21-0
Nature: Orange yellow powder. 21 ° Cis as follows: 11.8% water, 10% 9% ethanol, 50% ethanol 3% soluble glycerin, propylene glycol, is not soluble in oil, and an acid-azo dye, heat, acid, light stability, salt tolerance are good, citric acid and tartaric acid solution such as a very stable. Less oxidation resistance, alkali encountered slightly redden, reduction when bleaching.
Preparation: Sulfanilic acid by diazotization after 1-(4'-sulfophenyl) - 3-hydroxy-5-pyrazolone coupling in the system; Can also be dual hydroxy sodium tartrate and Phenylhydrazine right acid condensation and alkalization will generate the pigments used salt salting-out, generated from refining.
Purposes: For food, medicine, cosmetics coloring daily.
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