5,5'-[4-(dimethylamino)benzylidene]bis(3-methylsalicylic) acid

4-(Dimethylamino)benzaldehyde (1 Moore) and 2-Hydroxy-3-methylbenzoic acid (2 Moore) condensation, and in fiber on oxidation.

red light purple. Soluble in water is a deep red, slightly soluble in ethanol for magenta to wine red. In concentrated sulfuric acid to pale red orange brown, dilution after pink. Dye aqueous solution to join sodium hydroxide as very light red.

Standard	Ironing Fastness	Light Fastness	Fulling		Persperation Fastness	Soaping	Water
			Alkali	Acid
ISO	4	5	4	3	5	4-5	5