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 : C16H9N4Na3O9S2MW : 534.390CAS No. :1934-21-0nature : 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. Notice:Each item can have many explanations from different angels. If you want grasp the item comprehensively,please see below "more details data".