Cyclohexadiene is a colorless liquid hydrocarbon with the chemical formula C6H8. It consists of a six-membered carbon ring with two double bonds, making it an example of a diene. Cyclohexadiene can exist in two isomeric forms: 1,3-cyclohexadiene and 1,4-cyclohexadiene, which differ in the positions of the double bonds. This compound is primarily used in organic synthesis and as an intermediate in the production of various chemicals. Due to its unsaturated nature, cyclohexadiene can undergo reactions typical of alkenes, such as hydrogenation and polymerization, making it valuable in the chemical industry.