Sudan IV

• CAT Number: R046228
• CAS Number: 85-83-6
• Molecular Formula: C24H20N4O
• Molecular Weight: 380.44
• Purity: ≥95%
• Synonyms: 1-[[2-methyl-4-[(2-methylphenyl)diazenyl]phenyl]diazenyl]naphthalen-2-ol
• InChI: InChI=1S/C24H20N4O/c1-16-7-3-6-10-21(16)26-25-19-12-13-22(17(2)15-19)27-28-24-20-9-5-4-8-18(20)11-14-23(24)29/h3-15,29H,1-2H3
• InChIKey: RCTGMCJBQGBLKT-UHFFFAOYSA-N
• SMILES: CC1=CC=CC=C1N=NC2=CC(=C(C=C2)N=NC3=C(C=CC4=CC=CC=C43)O)C

Sudan IV（Cat No.:R046228）is a fat-soluble diazo dye widely used as a histological stain for detecting lipids, triglycerides, and lipoproteins in biological tissues. It imparts a vivid red coloration to neutral fats and lipid droplets, making it valuable in microscopy and pathology for studying adipose tissue, atherosclerotic plaques, and metabolic disorders. Beyond biomedical use, Sudan IV serves as a coloring agent in industrial applications, including plastics, waxes, and oils. Its lipophilic nature ensures selective staining of hydrophobic components, supporting research in cell biology, histochemistry, and disease diagnostics.