Acid Black 2

• CAT Number: R071104
• CAS Number: 8005-03-6
• Purity: ≥95%
• IUPAC Name: disodium;4-amino-5-hydroxy-3-[(4-nitrophenyl)diazenyl]-6-phenyldiazenylnaphthalene-2,7-disulfonate
• InChI: InChI=1S/C22H16N6O9S2.2Na/c23-19-18-12(11-17(39(35,36)37)21(22(18)29)27-24-13-4-2-1-3-5-13)10-16(38(32,33)34)20(19)26-25-14-6-8-15(9-7-14)28(30)31;;/h1-11,29H,23H2,(H,32,33,34)(H,35,36,37);;/q;2*+1/p-2
• InChIKey: AOMZHDJXSYHPKS-UHFFFAOYSA-L
• SMILES: 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+]

Acid Black 2（Cat No.:R071104）is a synthetic dye commonly used in textile and leather industries for dyeing wool, silk, and nylon fibers. It belongs to the azo dye class and has a deep black color with excellent colorfastness properties. Acid Black 2 is also used in some cosmetic products, food colorants, and inks. Its high solubility in water and ability to produce vibrant colors make it a popular choice for industrial applications. However, concerns regarding its potential environmental and health impacts have led to increased scrutiny and regulation of its use in certain products.