13benzenediamine

1,3-benzenediamine, commonly referred to as m-phenylenediamine (MPD), is an aromatic diamine containing two amino groups on a benzene ring at the 1 and 3 positions. Its chemical formula is C6H8N2, and the compound has a molar mass of about 108.14 g/mol. It is one of three isomeric phenylenediamines, with the amino groups in the meta orientation relative to each other.

The meta arrangement distinguishes it from the o- and p-phenylenediamine isomers, leading to different physical properties and reactivity patterns useful in various industrial applications. MPD is typically used as a chemical intermediate and building block rather than as a stand-alone material.

Industrial production of 1,3-benzenediamine is commonly accomplished by catalytic hydrogenation of m-dinitrobenzene, a route that converts the two nitro groups to amino groups. It may be supplied as a solid or in solution, and is handled under controlled conditions because of its reactivity and potential hazards.

Applications include its use as a precursor in the manufacture of polyurethanes and polyimides, as well as in the synthesis of azo dyes, pigments, and other organic intermediates. It can also function as a curing or crosslinking agent in epoxy resin formulations, contributing to material properties in coatings and composites.

Safety and handling: MPD is an irritant and can cause skin sensitization with sufficient exposure. It should be processed with appropriate personal protective equipment in a well-ventilated area, and handled in accordance with applicable chemical safety regulations.