Definition of alizarine red
: any of various red mordant or acid dyes most of which are derived from anthraquinone: such as
a : turkey red
b
: an orange-yellow crystalline compound C14H7NaO7S used chiefly for dyeing and printing aluminum-mordanted wool scarlet red, as a biological stain, and as an analytical reagent (as for detecting aluminum); sodium 3-alizarin-sulfonate
— called also
Alizarine Carmine, Alizarine Red S, Alizarine S
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