Disperse Red 9, also called C.I. 60505 and 1-methylamino anthraquinone, is a red dye

Dye

A dye is a colored substance that has an affinity to the substrate to which it is being applied. The dye is generally applied in an aqueous solution, and requires a mordant to improve the fastness of the dye on the fiber....

 derived from anthraquinone

Anthraquinone

Anthraquinone, also called anthracenedione or dioxoanthracene is an aromatic organic compound with formula . Several isomers are possible, each of which can be viewed as a quinone derivative...

. It has the appearance of a red powder with melting point of 170-172 °C.

Its EINECS number is 201-417-2.

Disperse Red 9 is used in some older red and violet-red colored smoke

Colored smoke

Colored smoke is a kind of smoke created by an aerosol of small particles of a suitable pigment or dye.Colored smoke can be used for smoke signals, often in a military context. It can be produced by smoke grenades, or by various other pyrotechnical devices...

 formulations. It is used in the M18 colored smoke grenade

Smoke grenade

Smoke grenades are canister-type grenades used as ground-to-ground or ground-to-air signaling devices, target or landing zone marking devices, or as screening devices for unit movements. Smoke grenades are normally considered non-lethal, although incorrect use may cause death...

 and also often in dye pack

Dye pack

A dye pack is a radio-controlled incendiary device used by some banks to preemptively foil a bank robbery by causing stolen cash to be permanently marked with red dye shortly after a robbery....

s. Its properties can be improved by coating the dye particles with an inert material, eg. an epoxy resin.