There are two types of Phenylenediamine, p-Phenylenediamine or para-Phenylenediamine, and o-Phenylenediamine or ortho-Phenylenediamine.
p-Phenylenediamine (IUPAC 1,4-phenyl-diamine), 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.
o-Phenylenediamine (1,2-Benzenediamine), 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.
See Also
DuPont Specialty Intermediates: p-Phenylenediamine (PPD)
DuPont Specialty Intermediates: o-Phenylenediamine (OPD)
