CAS 8003-88-1

Acid Orange 51

Description:

Acid Orange 51, with the CAS number 8003-88-1, is a synthetic azo dye commonly used in various applications, including textiles, food, and cosmetics. This dye is characterized by its vibrant orange color, which results from the presence of azo functional groups (-N=N-). Acid Orange 51 is water-soluble, making it suitable for use in aqueous dyeing processes. It exhibits good lightfastness and stability under acidic conditions, which is beneficial for maintaining color integrity in various applications. However, like many azo dyes, it may raise environmental and health concerns due to potential toxicity and the formation of aromatic amines upon degradation. Therefore, its use is often regulated in many countries. In terms of chemical structure, Acid Orange 51 typically contains sulfonic acid groups, enhancing its solubility and affinity for fibers. Overall, while Acid Orange 51 is valued for its coloring properties, careful consideration of its environmental impact and safety profile is essential in its application.

Formula: C₃₆H₂₈N₆O₁₁S₃·2Na

InChI: InChI=1/C36H28N6O11S3.2Na/c1-22-3-11-28(12-4-22)56(51,52)53-35-18-9-26(19-23(35)2)39-41-33-17-16-32(30-14-13-29(21-31(30)33)54(45,46)47)40-38-25-7-5-24(6-8-25)37-34-15-10-27(42(43)44)20-36(34)55(48,49)50;;/h3-21,37H,1-2H3,(H,45,46,47)(H,48,49,50);;/q;2*+1/p-2/b40-38+,41-39+;;

SMILES: Cc1ccc(cc1)S(=O)(=O)Oc1ccc(cc1C)N=Nc1ccc(c2ccc(cc12)S(=O)(=O)O)N=Nc1ccc(cc1)Nc1ccc(cc1S(=O)(=O)O)N(=O)=O.[Na].[Na]

Synonyms:

• 2-Naphthalenesulfonic acid, 5(or 8)-[[3-methyl-4-[[(4-methylphenyl)sulfonyl]oxy]phenyl]azo]-8(or 5)-[[4-[(4-nitro-2-sulfophenyl)amino]phenyl]azo]-, disodium salt
• Acid Red Brown 5K
• Acid orange 51
• Baygenal Red Brown LNZR
• Benzenesulfonic acid, 5(or 8)-(2-(3-methyl-4-(((4-methylphenyl)sulfonyl)oxy)phenyl)diazenyl)-8(or 5)-(2-(4-((4-nitro-2-sulfophenyl)amino)phenyl)diazenyl)-, sodium salt (1:2)
• Best Acid Milling Brown 5R
• Covanyl Brown 5R
• Disodium 5(Or 8)-(3-Methyl-4-(4-Methylphenylsulphonyloxy)Phenylazo)-8(Or 5)-4-(4-Nitro-2-Sulphophenylamino)Phenylazo)Naphthalene-2-Sulphonate
• Erionyl Brown RXL
• Eriosin Fast Brown RXL
• Indacid Red 2B
• Kayanol Milling Brown RX
• Kenanthrol Brown R
• Nylomine Acid Brown C-R
• Sandolan Brown N 2RL
• Suminol Milling Brown 5R
• Telon Fast Copper Red RL
• Triacid Fast Brown 5RN
• disodium 8-[(E)-(3-methyl-4-{[(4-methylphenyl)sulfonyl]oxy}phenyl)diazenyl]-5-[(E)-{4-[(4-nitro-2-sulfonatophenyl)amino]phenyl}diazenyl]naphthalene-2-sulfonate
• Acid Orange 51 (C.I.)
• C.I. Acid Orange 51