Sunset yellow, Food dyes Molecular formula : C16H10N2Na2O7S2 MW : 452.380 CAS No. :2783-94-0 Food cosmetic medicine use

Sunset yellow, Food dyes

Disodium salt of 1-p-sulfophenylazo-2-naphthol-6-sulfonic acid;Sunset yellow FCF;FD & C Yellow No.6;C.I.Food Yellow 3(15985);1-p-Sulfophenylazo-2-hydroxynaphthalene-6-sulfonate, disodium salt

Molecular formula : C16H10N2Na2O7S2MW : 452.380CAS No. :2783-94-0nature : orange-red powder. The solubility of 21 ° C : Water 25.3 ° C and 50% ethanol 0.9%. Gram-soluble oil, propylene glycol, soluble oils. 0.1% aqueous solution was yellow and orange. Light, heat, acid is very strong, alkali resistance is fairly good, but in cases of alkali was reddish-brown. The citric acid, tartaric acid and other acidic solution is stable. Reduction bleaching. preparation methods : by diazotization of sulfanilic acid, alkaline conditions with 2-naphthol-6-sulfonic acid coupling, the production of pigments used salt precipitation, filtration and purification derived. purposes : for food, medicine, cosmetics coloring, as well as manufacturing salt Lakes raw materials. 

Sunset yellow, Food dyes