1-naphthol

1-Naphthol (CAS 90-15-3) is a hydroxylated naphthalene compound used primarily as a chemical intermediate. Also sold under the dye intermediate designations Zoba ERN, Ursol ERN, and Tertral ERN.

Where is 1-naphthol used?

• Dyes and pigments: synthesis intermediate
• Pharmaceuticals: precursor to active ingredients and antioxidant stabilizer in drug formulations
• Textile and leather dyeing: coupling component in azo dye production
• Printing inks and packaging coatings: key intermediate for naphthol-based pigments
• Personal care: oxidative hair dye systems with controlled coupling reactions
• It reacts with diazonium salts to generate deep, fast colors on fiber substrates.

Good to know: Technical grade is the standard commercial form, with purity typically at 98% or higher. Pharmaceutical-grade material meeting USP or BP specifications is available for regulated synthesis applications.

Commercial specifications

• Purity typically 98% or higher (technical grade)