Fay, Irving W. (Irving Wetherbee), 1861-1936 · New York : D. Van Nostrand company · leaf 340
ND SAFRANINES 329 Basle blue R. is another blue dye of the tsorosindulines. It is a brown crystalline powder, and it dissolves in water with a bluish-violet color. If zinc dust is warmed with the solution, the color disappears; but it becomes blue again by exposure to the action of the air. Basle… … If to the bluish-violet aqueous solution of this dye hydro- chloric acid is added, a blue precipitate falls while a bluish- black precipitate is caused by sodium hydroxide. In strong sulphuric acid, the dye dissolves to a greenish- brown solution, then upon gradual addition of water, a change to…
Coal-tar colors
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