食品色素可分二大类·即食用天然色素和合成色素。一天然色素来源于植物和动物一般较为安全。但颜色不够鲜艳，其色泽随州的变化而变化。合成色素常以苯、甲苯、菜等化工产品为原料，经过诸如磺化、硝化、偶氮化等一系列有机反应而制成。由于经过较复杂的工艺过程，混入有害物? Food pigment can be divided into two categories, that is, natural pigment and synthetic pigment. A natural pigment from plants and animals is generally safer. But the color is not bright enough, its color varies with the state. Synthetic pigments are often benzene, toluene, vegetables and other chemical products as raw materials, after such as sulfonation, nitration, azo and a series of organic reactions made. Due to the more complicated process, mixed with harmful substances?