Organic compounds, light yellow mono-oblique crystals (pure colorless), with aromatic, flammable, insoluble in water, soluble in ethanol, ether. Can be replaced by electricity, such as halogenated, Nitrification, sulfonation and other reactions. Pyrene mainly exists in the distillate of coal tar pitch.

Pyrene is an organic synthetic raw material, can be prepared by oxidation of 1, 4, 5, 8-naphthalene four carboxylic acid, used in dyes, synthetic resins, disperse dyes and engineering plastics; can also be made of pesticides, plasticizers and so on.