7198-99-4

2-Amino-4-methoxy-5-acetamidobenzenesulfonic acid?diazo, in acid conditions and 6-Amino-4-hydroxynaphthalene-2-sulfonic acid acid coupling, and then hydrolysis amino acylation and light gasification.

red light purple. Soluble in water for red light purple, slightly soluble in alcohol. The strong sulfuric acid for blu-ray black, diluted for purple. The dye solution to join strong hydrochloric acid for purple, have precipitation; Add thick sodium hydroxide solution for wine red, have precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
ISO	3	5	5	2		2