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a yellow, crystalline solid, C 17 H 22 ClN 3 , soluble in water, alcohol, and ether, used chiefly as a dye for paper and leather.
Historical Examples

One of these dyes is a fine basic yellow known as “auramine,” which is a derivative of diphenylmethane.
Coal Raphael Meldola

It is interesting to notice that this irregularity sometimes occurs with soluble dyes, as for example in the case of auramine.
The Manufacture of Paper Robert Walter Sindall


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