2-Hydroxy-5-[bis[4-(dimethylamino)phenyl]methyl]-3-methylbenzoic acid

Preparation

N,N-dimethylaniline in sulfuric acid solution with Formaldehyde and N,N-dimethyl-4-nitrosobenzenamine processing, then and 2-Hydroxy-3-methylbenzoic acid reaction. This product in fiber on oxidation.

Properties and Applications

brilliant purple. Slightly soluble in water for hot ash purple, soluble in ethanol to purple. In concentrated sulfuric acid for brilliant yellow brown, dilution after Ocher yellow. Dye aqueous solution to join concentrated sodium hydroxide solution have light purple precipitation.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	4	4	4-5	1	5	4-5	5