3-Hydroxy-2-Naphthoic Acid
3-Hydroxy-2-Naphthoic Acid (CAS: 92-70-6), commonly called BON acid, is a key intermediate for azo pigments and dyes. It is a yellow to light brown crystalline powder that dissolves in alkaline solutions.
It is the starting point for Naphthol AS coupling components, which are condensed with aromatic amines to give the naphthol AS family used in vivid red pigments and dyes.
Pigment makers rely on its consistent assay and low residual naphthol to maintain colour strength and shade reproducibility.
It is supplied as a crystalline powder and should be stored dry and protected from light, which can darken it. Buyers check assay, melting point, moisture and residual 2-naphthol, as these affect the colour strength of final pigments.
• Azo pigment production: precursor for BONA-based lake and azo-condensation pigments used in inks, paints and plastics. Its strong coupling activity gives bright red and maroon shades.
• Naphthol AS intermediates: reacts with aromatic amines to give coupling components for dyes. These condensates are the base for a wide range of high-fastness pigments.
• Pharmaceutical and fine-chemical use: building block for selected medicinal compounds and fluorescent materials. Its fluorescent derivatives are also of interest in sensing.
• Optical and specialty materials: used to prepare fluorescent compounds, metal-chelating ligands and corrosion-protection additives.
Product Name: 3-Hydroxy-2-Naphthoic Acid
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