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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 ?
All chemicals used in the analysis; Tris-HCl buffer (Cat # 161-0798, BIO-RAD, USA), sodium acetate (S7670-500Q SIGMA-ALDRICH, USA), potassium phosphate (P3786500Q SIGMA-ALDRICH, USA), potassium chloride (Bendosen, Malaysia), O-tolidine (Bendosen, Malaysia), Triton-X-100 (R&M Chemicals, UK), ethanol (HmbG Chemicals, Malaysia and glacial acetic acid (HmbG Chemicals, Malaysia) were of analytical grade.
6 g of o-tolidine base to 40 mL of absolute ethanol.
DAF, DDS, t-CN, DAT, o-tolidine and the aliphatic acids were purchased from Aldrich and their purity was checked by NMR.