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Any of three isomeric compounds, C7H9N, used to make dyes.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(tɒˈljuːɪˌdiːn) or


(Elements & Compounds) an amine derived from toluene existing in three isomeric forms; aminotoluene. The ortho- and meta- isomers are liquids and the para- isomer is a crystalline solid. All three are used in making dyes. Formula: C6H4CH3NH2
[C19: from tolu(ene) + -ide + -ine2]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(təˈlu ɪˌdin, -dɪn)

any of three isomeric amines having the formula C7H9N, derived from toluene: used in the manufacture of dyes and drugs.
[1840–50; tolu (ene) + -idine]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
References in periodicals archive ?
In blood plasma and saline extract, glucose was determined by O-toluidine method of Hartel et al.
Hematoxylin and eosin (HE) staining of lumbar vertebrae was used to measure the disc development of KO and WT mice at 1, 3, 5, and 10 weeks postnatally and safranin O-toluidine blue staining of lumbar vertebrae was used at 1, 4, and 8 weeks postnatally as well.
[17], Poly(o-toluidine) and poly(o-anisidine) are the derivatives of polyaniline which contains the -C[H.sub.3] (methyl) and -OC[H.sub.3] (methoxy) group in the ortho position of the aromatic ring of the aniline monomer.
To 0.5 mL of filtrate in test tubes, add 4.5 mL of o-toluidine reagent (dissolve 1.5 g of thiourea in940 mL of glacial acetic acid and add 60 mL of o- toluidine).
Abstract A soluble copolymer from aniline and o-toluidine [poly (aniline-co-o-toluidine)] was synthesized by chemical oxidative copolymerization using ammonium persulphate as an oxidant in hydrochloride aqueous medium.
Studies have shown that in certain thermal processes, such as vulcanisation or tempering, the degradation product o-toluidine is formed.
Studies have shown that, when used with other curatives, DOTG can produce o-toluidine. O-toluidine has been classified in the 2006 MAK and BAT value list of the Duetsche Forschungsgemeinschaft (German Research Foundation) as a category 1 potential carcinogen (DFG, 2006 Edition).
Several other aromatic amines and related compounds have also been identified as suspected human bladder carcinogens, including 1-naphthylamine, 4-aminobiphenyl, 4-chloro-o-toluidine, o-toluidine, and 4,4'-methylenedianiline [Engel et al.
Dubowski adapted o-toluidine (2-aminotoluene) in glacial acetic acid on the suggestion of Scandinavian chemist O.M.
Blood methemoglobin and plasma lidocaine, prilocaine, and o-toluidine (a metabolite of prilocaine that causes methemoglobinemia) were measured to assess safety.