Organic synthesis intermediates are chemical compounds that are used as building blocks in the synthesis of a wide range of organic compounds. They are typically small, high-value molecules that are produced in relatively small quantities and are used as intermediates in the manufacture of a variety of products, including pharmaceuticals, agrochemicals, flavors and fragrances, and plastics. Organic synthesis intermediates can be synthesized from a variety of raw materials, including petrochemicals, renewable feedstocks, and natural products. They can be classified according to the type of chemical reactions used to synthesize them, such as condensation reactions, substitution reactions, and oxidation reactions.

Organic synthesis intermediates are an important component of the chemical industry, as they are used as starting materials for the manufacture of a wide range of products. They are typically synthesized in specialized chemical plants and are used in the production of a variety of end-use products, including drugs, agrochemicals, and plastics.