1. Applied to pesticides, the known pesticide intermediates and original drugs using o-toluidine as raw materials include the fungicide tricyclazole, the insecticide borenazolin, diphenamide, the herbicide acetochlor, 2-methyl-6-ethylaniline, etc.;

2. Applied to dyes, the known dye intermediates and finished products using o-toluidine as raw materials include reactive dyes, acid dyes such as red-based RL, bright red-based G, maroon-based GBC, basic magenta, naphthol AS-D, basic dyes, N,N-diethyl-o-methylaniline, N-methyl-o-methylaniline, etc.

3. Applied in medicine, the known pharmaceutical intermediates using o-toluidine as raw materials include methaphone, heminal, prilocaine, cloxacillin sodium, bromhexine hydrochloride, 3,8-dimethylquinoline, 8-methylquinoline, 3-nitroindazole, N-o-tolylthiourea, 2-mercaptotoluene, etc.

4. Others include gasoline anti-riot agents, etc.