N,N,N',N'-Tetramethyl-p-phenylenediamine

N,N,N',N'-Tetramethyl-p-phenylenediamine, also known as TMPD, is widely used as Redox indicator and as a reference redox couple in biological electrochemical studies. Its action in stimulating the activity of certain enzymes has also been studied. It is a vital part of pharmaceutical manufacturing, especially in the process of drug discovery where TMPD is used as a reagent to induce redox reactions during the bioassay process.