toluidine

[tuh-loo-i-deen, -din]

noun Chemistry.

any of three isomeric amines having the formula C7H9N, derived from toluene: used in the dye and drug industries.

Compare metatoluidine, ortho-toluidine, para-toluidine.

Origin of toluidine

First recorded in 1840–50; tolu(ene) + -id³ + -ine²

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for toluidine

Historical Examples of toluidine

The aniline selected for this purpose should contain about 25% of the toluidine.
Cooley's Practical Receipts, Volume II
Arnold Cooley
From this it will be evident that an aniline rich in toluidine is an essential condition for obtaining aniline red.
Cooley's Practical Receipts, Volume II
Arnold Cooley
The result is a diazo-salt; aniline, for example, giving diazobenzene chloride, and toluidine diazotoluene chloride.
Coal
Raphael Meldola
The large quantity of aniline and toluidine now made has opened up a channel for the use of the waste borings from cast-iron.
Coal
Raphael Meldola
By a similar process toluene is converted into nitrotoluene, and the latter into toluidine.
Coal
Raphael Meldola

British Dictionary definitions for toluidine

toluidine

noun

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: C 6 H 4 CH 3 NH 2

Word Origin for toluidine

C19: from tolu (ene) + -ide + -ine ²

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Science definitions for toluidine

toluidine

[tə-lōō′ĭ-dēn′]

Any of three isomeric compounds containing a benzene ring with a methyl (CH3) and amino (NH2) group attached to it. Toluidine is used to make dyes. Chemical formula: C7H9N.