commonly known as Delphine Blue. aniline and mordant Gallocyanine?[by excessive amounts of N,N-dimethyl-4-nitrosobenzenamine and Gallic acid?Methanol in the reaction (in ethanol in reaction incomplete) and be] hydrochloride heating, sulfonation and translated into sodium salt. Note: in order to improve yield, in heating to prevent leuco – mordanting Gallic acid formation (the leuco not with ?aniline?condensation), to the mixture blast air.
Properties and Applications
green blue. Soluble in water for blue purple. In concentrated sulfuric acid to red light purple, dilution of dark after precipitation. Dye aqueous solution to join sodium hydroxide have red precipitation.
