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noun, Chemistry.
a red dye, C 2 0 H 2 0 N 3 Cl, derived from aniline and orthotoluidine, a constituent of fuchsin.
the base, C 2 0 H 2 1 N 3 O, which, with hydrochloric acid, forms this dye.
a reddish-brown crystalline insoluble derivative of aniline used, in the form of its soluble hydrochloride, as a red dye See also fuchsin

rosaniline ros·an·i·line or ros·an·i·lin (rō-zān’ə-lĭn)
A brownish-red crystalline organic compound derived from aniline and used in the manufacture of dyes and in Schiff’s reagent.


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