Intermediate refers to a semi-finished product that is the product of the production of certain products. For example, to produce a product, it can be produced from an intermediate, which saves costs.
The intermediate is formed by a reaction of a cyclic compound such as benzene, naphthalene or anthracene by sulfonation, alkali fusion, nitration, reduction or the like. For example, benzene is nitrated to nitrobenzene, and then reduced to aniline, which can be chemically processed into dyes, drugs, vulcanization accelerators, and the like. Both nitrobenzene and aniline are intermediates.
It is also obtained by reacting acyclic compounds such as methane, acetylene, propylene, butane, butylene, etc. by dehydrogenation, polymerization, halogenation, hydrolysis, and the like. For example, butane or butene is dehydrogenated to butadiene, and butadiene can be chemically processed into synthetic rubber, synthetic fibers, and the like. Butadiene is an intermediate.
Originally referred to as the intermediate product produced in the process of synthesizing chemical products such as perfumes, dyes, resins, pharmaceuticals, plasticizers, rubber accelerators, etc. from coal tar or petroleum products. It is now broadly referred to as various intermediates obtained during organic synthesis.