Raw materials required for an industrial process. In the chemical industry, common feedstocks include natural gas or natural gas liquids such as naphtha, gas oil, and ethane. Benzene, ethylene, propylene, and other olefins are examples of feedstocks used as the building blocks for the production of value added petrochemicals.

An informal term referring to a range of intermediate products derived from benzene or xylenes, such as p-xylene, cyclohexane, and TPA, which may be further processed to create polymers for synthetic fibers such as polyester and nylon.