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


(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]


(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]
References in periodicals archive ?
Four substances have been added to the HHS Report on Carcinogens, including ortho-toluidine, used to make rubber chemicals, pesticides, and dyes; and cumene, used in acetone production and also found in tobacco smoke.
A study conducted by the National Institute for Occupational Safety and Health (NIOSH) reveals new evidence that workers directly exposed to two rubber chemicals - ortho-toluidine and aniline - have an increased risk of developing bladder cancer than the general population.
Currently, workplace exposure limits are set at 5 parts per million for ortho-toluidine and 2 ppm for aniline.