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Skeletal structure of 2,5-Diaminotoluene — 2,5-Diaminotoluene

Toluenediamine may refer to these isomeric organic compounds with the formula C₆H₃(NH₂)₂(CH₃):

2,4-Diaminotoluene, precursor to toluene diisocyanate and azo dye.
2,6-Diaminotoluene, a common impurity in 2,4-diaminotoluene
2,5-Diaminotoluene, precursor to hair dyes.

source: http://en.wikipedia.org/wiki/Toluenediamine