Pyridine is an organic compound and a six-membered heterocyclic compound containing nitrogen heteroatoms. It can be regarded as a compound in which (ch) in benzene molecule is replaced by N, so it is also called azobenzene. It is a colorless or yellowish liquid with a foul smell. Pyridine and its homologues exist in bone tar, coal tar, natural gas, shale oil and petroleum. Pyridine can be used as denaturant, dyeing assistant and raw material for synthesizing a series of products (including medicines, disinfectants and dyes) in industry. Another name of pyridine: nitrogen (hetero) benzene Chemical formula: C5H5N molecular weight: 79. 10 Application route: pyridine can be used as denaturant, dyeing assistant and starting material for synthesizing a series of products (including medicines, disinfectants, dyes, food seasonings, adhesives, explosives, etc.) in industry. ). Pyridine can also be used as a catalyst, but the dosage should not be too much, otherwise the product quality will be affected. As a corrosion inhibitor, pyridine has a corrosion inhibition effect on metals, and its adsorption effect is used to achieve the purpose of corrosion inhibition.