Acid Yellow 42

• CAT Number: M011690
• CAS Number: 6375-55-9
• Molecular Formula: C32H24N8Na2O8S2
• Molecular Weight: 758.69
• Purity: ≥95%
• Storage: -20°C
• IUPAC Name: disodium;5-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-[4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)diazenyl]-2-sulfonatophenyl]benzenesulfonate
• InChI: InChI=1S/C32H26N8O8S2.2Na/c1-19-29(31(41)39(37-19)23-9-5-3-6-10-23)35-33-21-13-15-25(27(17-21)49(43,44)45)26-16-14-22(18-28(26)50(46,47)48)34-36-30-20(2)38-40(32(30)42)24-11-7-4-8-12-24;;/h3-18,29-30H,1-2H3,(H,43,44,45)(H,46,47,48);;/q;2*+1/p-2
• InChIKey: ZRYQXQUPWQNYSX-UHFFFAOYSA-L
• SMILES: CC1=NN(C(=O)C1N=NC2=CC(=C(C=C2)C3=C(C=C(C=C3)N=NC4C(=NN(C4=O)C5=CC=CC=C5)C)S(=O)(=O)[O-])S(=O)(=O)[O-])C6=CC=CC=C6.[Na+].[Na+]

Acid Yellow 42（Cat No.:M011690）, also known as CI Acid Yellow 42 or Yellow 2G, is a synthetic dye and colorant. It belongs to the class of azo dyes and is commonly used in various industries, including textiles, paper, and cosmetics, to provide vibrant yellow coloring. It is often utilized in dyeing processes due to its strong coloration properties and its ability to bond with various types of fibers and materials. However, like other synthetic dyes, its environmental impact and safety considerations are important factors in its use.