Solvent Dyes

A solvent dye is a dye soluble in organic solvents. It is usually used as a solution in an organic solvent. Solvent Dyes are used to color organic solvents, hydrocarbon fuels, waxes, lubricants, plastics, and other hydrocarbon-based non polar materials. Fuel dyes are one use of solvent dyes. Their molecules are typically non polar or little polar, and they do not undergo ionization. They are insoluble in water.
Names of solvent dyes are often generic, of the scheme [solvent ", eg. Solvent Red 197, solvent orange 107, Solvent Violet 13, solvent yellow 185, solvent blue 104, etc.
Red and yellow solvent dyes are often azo dyes, green and blue ones tend to be anthraquinone dyes.