C.I.17580;Acid Black 31;C.I.Acid Black 31;C.I.Acid Black 31:C.I.17580;4-HO-5-(2-MEO-4-NITRO-PH-AZO)-6-PHENYLAMINO-NAPHTHALENE-2-SULFONIC ACID, NA;sodium 4-hydroxy-5-[(2-methoxy-4-nitrophenyl)azo]-6-(phenylamino)naphthalene-2-sulphonate;sodium,5-[2-(2-methoxy-4-nitrophenyl)hydrazinyl]-4-oxo-6-phenyliminonaphthalene-2-sulfonate;4-Hydroxy-5-[(2-methoxy-4-nitrophenyl)azo]-6-(phenylamino)-2-naphthalenesulfonic acid sodium salt;sodium 4-hydroxy-5-[(2-methoxy-4-nitrophenyl)azo]-6-(phenylamino)naphthalene-2-sulphonate ISO 9001：2015 REACH
2-Methoxy-4-nitrobenzenamine diazo, in acid conditions and 4-Hydroxy-6-(phenylamino)naphthalene-2-sulfonic acid coupling.
Properties and Applications
blue and black. Blue-ray black powder. Soluble in water for purple to blue-black, soluble in ethanol for purple. The strong sulfuric acid are purple to blue-black, a grey purple diluted. Its water solution and strong hydrochloric acid for violet black; Add thick as a hydrogen oxidation solution tresses. Mainly used for wool fabric and wool/rayon blended fabric dyeing, pitch-black degree good, high fastness. Also used in leather dyeing.
