Phenylenediamine may refer to:
- o-Phenylenediamine or OPD, a chemical compound C<sub>6</sub>H<sub>4</sub>(NH<sub>2</sub>)<sub>2</sub>
- m-Phenylenediamine or MPD, a chemical compound C<sub>6</sub>H<sub>4</sub>(NH<sub>2</sub>)<sub>2</sub>
- p-Phenylenediamine or PPD, a chemical compound C<sub>6</sub>H<sub>4</sub>(NH<sub>2</sub>)<sub>2</sub>
Related compounds