Sudan Red is a chemical coloring agent, not a food additive. Its chemical composition contains a complex compound with a naphthalene ring structure, which has an azo structure.

Sudan red solubility: insoluble in water, slightly soluble in ethanol, soluble in grease, mineral oil, acetone and benzene. Ethanol solution is purplish red, in concentrated sulfuric acid is magenta, diluted into orange precipitate.

Sudan red use: Sudan red is a synthetic red dye, often as an industrial dye, is widely used in such as solvents, oils, waxes, gasoline color enhancement, as well as shoes, flooring, and other lightening.

The general public, although it is difficult to determine which foods contain Sudan red, but there is no need to look at the "red", "spicy" fear. In addition to Sudan red, edible red coloring agent there are thousands of species, such as cochineal red, new red, amaranth red, etc., these coloring agents can be added to food in a limited amount.

They are fundamentally different from the nature of "Sudan red", the former two are included in the national catalog of food additives, can be used in some foods, but the country has a strict limit, is strictly prohibited in excess. The use of food additives within the standard range, there is no safety problem.

Reference: Baidu Encyclopedia - Sudan Red