Nigrosine, also known as Acid Black, is a mixture of synthetic black dyes used in histology and textile dyeing. Its structure contains aromatic rings and sulfonate groups, typically present as a sodium salt, giving it acidic dye properties.
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CAS 8005-03-6
4-Amino-5-hydroxy-3-((4-nitrophenyl)azo)-6-(phenylazo)naphthalene-2,7-disulphonic acid, sodium salt
textile and leather dye
Disodium 4-amino-3-((4-aminophenyl)azo)-5-hydroxy-6-(phenylazo)naphthalene-2,7-disulphonate
Acid dye for textiles
C.I. Direct green 1
Direct dye for cellulose fibers
Benzoic acid, 2-hydroxy-5-((4-((((2-methoxy-4-((3-sulfophenyl)azo)phenyl)amino)carbonyl)amino)phenyl)azo)-, disodium salt
Direct dye for textiles
H2TPTBP
Dye and pigment intermediate
Ácido de Armstrong
Dye intermediate
Amsonic acid
chemical intermediate for dyes and fluorescent brighteners
C.I. REACTIVE BLACK 5
reactive dye for textile
disodium;4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate
AOMZHDJXSYHPKS-UHFFFAOYSA-L
C1=CC=C(C=C1)N=NC2=C(C3=C(C(=C(C=C3C=C2S(=O)(=O)[O-])S(=O)(=O)[O-])N=NC4=CC=C(C=C4)[N+](=O)[O-])N)O.[Na+].[Na+]