ERIOCYANINE A

5-(Dimethylamino)-2-((4-(dimethylamino)phenyl)(hydroxy)methyl)benzenesulfonic acid and N-benzyl-N-3′-sulfobenzylaniline?condensation, and then will product oxidation, and translated into sodium salt.

purple light blue. Soluble in water and ethanol is purple. The strong sulfuric acid for light brown, diluted into light green to blue.

Standard	Light Fastness	Soaping		Persperation Fastness	Oxygen bleaching		Fastness to seawater
		Fading	Stain		Fading	Stain	Fading	Stain
ISO	2	3-4	5	3	4-5
AATCC	1	3	3	4	1		2