Fay, Irving W. (Irving Wetherbee), 1861-1936 · New York, D. Van Nostrand Co. · leaf 203
192 COAL-TAR DYES … SOgNa Naphthylamine black D. The dyestuff is a black powder which in water gives a violet black solution. Addition of hydrochloric acid causes a black precipitate and caustic soda produces a precipitate of the same color, which is soluble in pure water. It forms a bluish black solution in strong…
Coal-tar colors · Dyes and dyeing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
