Basic fuchsin

a greenish, water-soluble, solid, coal-tar derivative, obtained by the oxidation of a mixture of aniline and the toluidines, that forms deep-red solutions: used chiefly as a dye.
a greenish crystalline substance, the quaternary chloride of rosaniline, forming a red solution in water: used as a textile dye and a biological stain. Formula: C20H19N3HCl Also called magenta

basic fuchsin n.
A mixture of rosanilin and pararosanilin chlorides used to stain cellular elements, certain tissues, and bacteria, especially tubercle bacilli.

fuchsin fuch·sin (fyōōk’sĭn) or fuch·sine (-sĭn, -sēn’)
Any of various red to purple-red rosanilin dyes used as bacterial and histological stains.


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