2-Methylaniline is an important intermediate for the production of dyes and pigments. It can be used to prepare direct red 62, red group RL, red group G, jujube red group GBC, basic fuchsin, chromophenol as-d, acid red 35, 158, 265, Solvent Red 124, diazo component and coupling component of azo dyes, etc. it can also be used as raw materials for the production of pesticides to synthesize pesticide fungicides Tricyclazole, insecticide fenofibrate Chlordimeform and herbicide acetochlor can also be used as raw materials of rubber vulcanization accelerator, saccharin and corrosion inhibitor. In organic synthesis, o-toluidine is mainly used to synthesize heterocyclic compounds indole and its derivatives.