Colorants are food additives that give food color and improve food color.
Colorants, also known as food colorants, are substances that give food color and improve food color. They belong to food additives. At present, there are more than 60 kinds of food colorants commonly used in the world. According to their sources and properties, they can be divided into two categories: natural coloring agents and synthetic colorants. Natural coloring agent of food mainly comes from natural pigment. According to its source, there are three main types: one is plant pigment, such as beet red, Jiang Huang, beta carotene, chlorophyll and so on; two is animal pigment, such as lac red, rouge red and so on, and three is microorganism, such as red koji red. Food synthetic colorants are mainly synthesized according to some special chemical groups or chromogenic groups. According to their chemical structure, they can be divided into two categories, one is azo pigments such as amaranth, carmine, sunset yellow, lemon yellow, new red, seductive red and acid red, and two are non azo pigments, such as erythryte red, bright blue and so on.