What is "phenylenediamine"

n. (context chemistry English) any of the three isomeric di-amino-benzenes, used as intermediates in the manufacture of pharmaceuticals, plastics etc.

Phenylenediamine may refer to:

• o-phenylenediamine or OPD, a chemical compound CH(NH)
• m-phenylenediamine or MPD, a chemical compound CH(NH)
• p-phenylenediamine or PPD, a chemical compound CH(NH)
• N,N-dimethyl-p-phenylenediamine or DMPD
• N,N,N′,N′-tetramethyl-p-phenylenediamine or TMPD, used in microbiology