Fuel dyes

The pure dyes found in modern liquid Fuel Dyes are essentially longer alkyl side chain forms of traditional dyes and normally multiple chain length variations of the chromophore are found within a typical commercial liquid petroleum dye. For instance, Sudan Red 462 is essentially Solvent Red 19, with the ethyl side chain replaced by either a 2-ethylhexyl or a tridecyl side chain. The longer branched side chains improve solubility dramatically, but in some cases the high solubility prevents the dye being isolated as a crystal, except at very low temperatures. The high solubility liquid dyes originated with Morton International and BASF (ACNA Italy) as the primary inventors. For instance, Morton created Solvent Blue 98 as a high solubility form of Solvent Blue 35. BASF created Solvent Blue 79 as its high solubility form of Solvent Blue 35. In some cases it is possible, with normal solvents - e.g. xylene - to prepare stable (to -20C) solutions at 65% "solids" content. The original powder dye form of the chromophore would not be soluble beyond 2% in xylene.

High quality liquid solvent dyes used as color additives in various petroleum markets. These markets include: Gasoline, diesel fuel, aviation fuels, marine, lubricants, and oil greases. These dyes are also used in aerobatic smokes, candle wax, wood stains and industrial writing instruments. Navipol® dyes are available in either regular xylene or in high flash aromatic solvents. These dyes can also be made available in multiple solvent systems to meet specific applications.