tetramethylpphenylenediamine

Tetramethylp-phenylene diamine, also known as N,N,N',N'-tetramethyl-p-phenylenediamine, is an organic aromatic diamine used principally as an intermediate in the manufacture of dyes, pigments, and specialty polymers. The molecule consists of a para-disubstituted benzene ring bearing two amino groups and four methyl substituents (1,4-diamino-2,3,5,6-tetramethylbenzene).

Industrially, it is produced by methylation of commercially available p-phenylenediamine or by selective functionalization of related ring systems. It serves as a building block for azo dye chemistry and related pigment formulations, and as a precursor in the synthesis of specialty polymers and redox-active materials.

In analytical chemistry and biochemistry, N,N,N',N'-tetramethyl derivatives are used as reducing agents or redox mediators, and as substrates in colorimetric assays, either alone or as components of dye-forming reactions.

Safety and handling: The compound is a skin and eye irritant and can cause sensitization in some individuals. Handling requires appropriate personal protective equipment and engineering controls; exposure limits and disposal are governed by local regulations. It is not intended for consumer use in its concentrated form.

See also: p-phenylenediamine; tetramethyl derivatives; azo dyes; redox mediators.