The ortho isomer is produced on the largest scale. Its primary application is as a precursor to the pesticides metolachlor and acetochlor.6 The other toluidine isomers are used in the production of dyes. They are a component of accelerators for cyanoacrylate glues.
In some patients o-toluidine is a metabolite of prilocaine, which may cause methemoglobinemia. This is then treated with methylene blue.
Muspratt, James Sheridan; Hofmann, Augustus William (September 1845). "On toluidine, a new organic base". The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science. 27 (179): 178–194. doi:10.1080/14786444508645253. ISSN 1941-5966. https://books.google.com/books?id=P7PN-PlMrlQC&pg=PA178 ↩
Bowers, Joseph S. "Toluidines". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a27_159. ISBN 978-3-527-30673-2. 978-3-527-30673-2 ↩
Pratesi, G.; Bartolini, P.; Senatra, D.; Ricci, M.; Righini, R.; Barocchi, F.; Torre, R. (2003). "Experimental studies of the ortho-toluidine glass transition". Physical Review E. 67 (2): 021505. Bibcode:2003PhRvE..67b1505P. doi:10.1103/PhysRevE.67.021505. PMID 12636682. /wiki/Bibcode_(identifier) ↩
Alba-Simionesco, C.; Fan, J.; Angell, C. A. (1999). "Thermodynamic aspects of the glass transition phenomenon. II. Molecular liquids with variable interactions". The Journal of Chemical Physics. 110 (11): 5262. Bibcode:1999JChPh.110.5262A. doi:10.1063/1.478800. /wiki/Bibcode_(identifier) ↩