C.I. 37525

• CAT Number: I024657
• CAS Number: 92-76-2
• Molecular Formula: C18H14ClNO2
• Molecular Weight: 311.76
• Purity: 98%
• Synonyms: Acna Naphthol T; C.I. Azoic Coupling Component 8; NSC50686; NSC 50686; NSC-50686
• Solubility: Soluble in DMSO
• Appearance: Solid powder
• Storage: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).
• IUPAC Name: N-(4-chloro-2-methylphenyl)-3-hydroxy-2-naphthamide
• InChI: InChI=1S/C18H14ClNO2/c1-11-8-14(19)6-7-16(11)20-18(22)15-9-12-4-2-3-5-13(12)10-17(15)21/h2-10,21H,1H3,(H,20,22)
• InChIKey: PSRNXESQSJEQMN-UHFFFAOYSA-N
• SMILES: CC1=C(C=CC(=C1)Cl)NC(=O)C2=CC3=CC=CC=C3C=C2O

C.I. 37525(CAT: I024657), also known as Acid Red 87, is a synthetic azo dye widely used in the textile, leather, and paper industries for coloring applications. As an acid dye, it is water-soluble and binds effectively to protein fibers such as wool, silk, and nylon through ionic interactions. The dye’s vibrant red hue and good solubility make it suitable for producing bright and long-lasting colors. However, like many azo dyes, C.I. 37525 may undergo azo-reduction to form potentially harmful aromatic amines, raising environmental and health concerns. Its use is monitored in industrial dyeing and colorant research for safety and sustainability.