Fay, Irving W. (Irving Wetherbee), 1861-1936 · New York, D. Van Nostrand Co. · leaf 212
THE AZO DYES 201 < >< >N N N OH … OH Diamine fast red F. Finished in acid solution The dye is a brownish red powder soluble in water with a red color. Hydrochloric acid throws down a red precipitate, caustic soda produces a soluble red precipitate. A reddish blue solution in strong sulphuric acid gives a brown precipi- tate as…
Coal-tar colors · Dyes and dyeing
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
