Used for coloring food, medicine, and daily cosmetics. Edible indigo is a synthetic food pigment. Food coloring is a type of additive used for food coloring, including synthetic and natural pigments, with a total of over 60 types.
Redox indicator. A reagent for testing nitrate and chlorate in milk. Biological staining agents, such as the staining of Nikki bodies and cell nuclei. Measurement of renal function, etc.
