Dicyclopentadiene, commonly known as DCPD, is a substance having the chemical formula C10H12. It is a white, brittle wax at room temperature, though lesser purity samples might be liquids with a straw color. Less pure samples have a more overtly unpleasant odor, with the pure substance having a scent that is somewhat comparable to soy wax or camphor. Certain resins and insecticides are produced using DCPD as a chemical intermediary