Diamine

Amine oxidase is an enzyme involved in the metabolism of histamine.

Ethylenediamine (abbreviated as en when a ligand) is the organic compound with the formula C₂H₄(NH₂)₂. This colorless liquid with an ammonia-like odor is a strongly basic amine.

Ethylenediamine (abbreviated as en when a ligand) is the organic compound with the formula C₂H₄(NH₂)₂. This colorless liquid with an ammonia-like odor is a strongly basic amine.

Hexamethylenediamine is the organic compound with the formula H₂N(CH₂)₆NH₂. The molecule is a diamine, consisting of a hexamethylene hydrocarbon chain terminated with amine functional groups. The colorless solid (yellowish for some commercial samples) has a strong amine odor, similar to piperidine.

P-Phenylenediamine (PPD) is an aromatic amine used as a component of engineering polymers and composites, aramid fibers, hair dyes, rubber chemicals, textile dyes, and pigments. PPD is selected because of its high temperature stability, high strength, and chemical and electrical resistance.