English name: lemon yellow or lemon yellow
Molecular formula: C 16H9N4O9S2 Na3 (pigment lemon yellow)
Structural formula:
Chemical name: 1-(4- sulfophenyl) -4-(4- sulfophenyl azo) -5- pyrazolone -3- carboxylate.
The appearance of edible lemon yellow is orange powder, slightly soluble in alcohol and insoluble in other organic reagents. Its chemical composition is 3- carboxyl -5- hydroxyl-1- (p-sulfobenzene) -4- (p-sulfophenylazo) o- trisodium, and its main raw materials are p-aminobenzenesulfonic acid and tartaric acid.
Water-soluble synthetic pigment, bright bright yellow, monochromatic variety. Appropriate amount of lemon yellow can be safely used for coloring food, beverage, medicine, cosmetics, feed, tobacco, toys, food packaging materials and so on. Synthetic pigments allowed in China are amaranth, carmine, lemon yellow, sunset yellow and indigo. They are used for surface coloring of fruity water, fruity powder, sherbet, soda water, mixed wine, red and green silk, canned food and cakes. These synthetic pigments do make the surface of food look particularly attractive, but they are forbidden to be used in the following foods: meat and its processed products (including processed internal organs), fish and its processed products, fruits and their products (including juice, preserved fruit, jam, jelly and brewed wine, condiments, infant food, biscuits, etc.