toluidine

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

noun

, Chemistry.

1. any of three isomeric amines having the formula C 7 H 9 N, derived from toluene: used in the dye and drug industries.

toluidine

/ tɒˈljuːɪˌdiːn /

noun

1. 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

toluidine

/ tə-lo̅o̅′ĭ-dēn′ /

1. Any of three isomeric compounds containing a benzene ring with a methyl (CH 3 ) and amino (NH 2 ) group attached to it. Toluidine is used to make dyes. Chemical formula: C 7 H 9 N.

Word History and Origins

Origin of toluidine¹

First recorded in 1840–50; tolu(ene) + -id ³ + -ine ²

Word History and Origins

Origin of toluidine¹

C19: from tolu ( ene ) + -ide + -ine ²

Example Sentences

Plates were incubated for 4days, then fixed with 4% formal saline and counterstained with toluidine blue for plaque counting.

From Nature

Note also that cells in ganglia of treated with NGF exhibit a greater affinity for toluidine blue, the dye used to stain the cells.

From Scientific American

Blue.—Methylene blue, new methylene blue, toluidine blue, thionine blue, indamine blue, Victoria blue, night blue, Nile blue, turquoise blue, marine blue, indoine blue, metamine blue, Capri blue, indazine, metaphenylene blue, paraphenylene blue, toluylene blue, indigene, indol blue, diphene blue, setopaline, setocyanine, setoglaucine, Helvetia blue.

From Project Gutenberg

They used two drugs which worked equally well: toluidine blue, a tissue stain, and protamine sulfate, a protein compound.

From Time Magazine Archive

By a similar process toluene is converted into nitrotoluene, and the latter into toluidine.

From Project Gutenberg