Phenylenediamine
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There are three types of phenylenediamine: o-Phenylenediamine or ortho-Phenylenediamine, m-Phenylenediamine or meta-Phenylenediamine and p-Phenylenediamine or para-Phenylenediamine.
o-Phenylenediamine (1,2-phenyldiamine), also known as OPD, is an intermediate used in the production of fungicides, corrosion inhibitors, various pigments and in the production of some pharmaceuticals. OPD is also used to remove sulfur from ores, and to remove coloration by aldehydes in polymeric products. Its CAS number is [95-54-5] [1] and its SMILES structure is Nc1ccccc1N.
m-Phenylenediamine (1,3-phenyldiamine), also known as MPD is used (with isophthaloyl chloride) to produce Nomex®. Its CAS number is [108-45-2] [2] and its SMILES structure is Nc1cc(N)ccc1.
p-Phenylenediamine (IUPAC 1,4-phenyldiamine), also called PPD for short, is a diamine used in the production of plastic composites and polymers, rubber products, and many types of dyes and pigments, including hair dye. It is one of the two components used in the production of Kevlar®, among other things. Its CAS number is [106-50-3] [3] and its SMILES structure is Nc1ccc(N)cc1.
