Sudan" is a brand name of a class of dyes that are soluble in alcohol and esters. There are more than 60 varieties and are mass-produced at home and abroad.
The colors include yellow , orange, red, blue, purple, green, brown, black and other chromatograms. Because it can be used for solvent coloring, the "Dye Index" classifies it as a solvent dye, and is called an oil-soluble dye in China. . The main uses of Sudan dyes are:
l Coloring of paraffin wax and its products, such as floor wax, shoe polish, glazing wax, candles, etc.;