INS No. 143
FD&C Green No. 3
CAS No. 2353-45-9
CI Food Green 3
Fast green is a triphenylmethane dye that occurs as a red to brown-violet powder or granules It is primarily the inner disodium salt of N-ethyl-N-[4- [[4-[ethyl[(3-sulfophenyl)methyl]amino] phenyl](4-hydroxy-2-sulfophenyl)methylene]-2,5-cyclohexadien-1-ylidene]-3-sulfobenzene -methanaminium hydroxide. It may be converted to the corresponding aluminum lake.
Fast green FCF is used for coloring cosmetics, drugs, and food, including dietary supplements, breakfast cereals, cakes and cupcakes, drink mixers and frozen treats.
Fast green FCF (INS No. 143) is added to foods and beverages at concentrations up to a maximum permitted level (MPL) as established by the Codex Alimentarius Commission. There are more than 30 food categories for which MPLs for fast green have been adopted in the General Standard of Food Additives.
Evaluation of certain food additives (84th report of the Joint FAO/WHO Expert Committee on Food Additives) WHO Technical Report Series No.1007, 2017. Available online