Fay, Irving W. (Irving Wetherbee), 1861-1936 · New York, D. Van Nostrand Co. · leaf 321
COAL-TAR DYES 310 Then the condensation of the p-toluylenediamine with the o-toluidine and aniline follows thus: Hoc/\ N H H + 2O2 = … NHo HoN Aniline hydrochloride Safranine hydrochloride. The dye Note. If the aniline is replaced by a monoaklyl-o-toluidine, a safranine yielding a clearer shade of red in dyeing is formed. Hydrochloric acid changes a safranine solution to a bluish color. Sodium hydroxide causes a brownish-red…
Coal-tar colors · Dyes and dyeing
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