sodium 7-[(4-aminobenzoyl)amino]-4-hydroxy-3-[(2-methoxyphenyl)azo]naphthalene-2-sulphonate

O-Anisidine diazo, and 7-(4-Aminobenzamido)-4-hydroxynaphthalene-2-sulfonic acid coupling.

red. Soluble in water for red, moderate soluble in alcohol for red orange, and adequate soluble in soluble fiber element, insoluble in other organic solvents. The strong sulfuric acid for purple, diluted in red. The dye solution to join strong hydrochloric acid for red to blue light red, precipitation; Add thick sodium hydroxide solution have orange brown precipitation.

Standard	Acid Resistance	Alkali Resistance	Light Fastness	Soaping		Water
				Fading	Stain	Fading	Stain
AATCC	5	4	3	2		4