3-Hydroxy-2-naphthoic Acid (CAS 92-70-6), commonly referred to as BON Acid, is a pivotal intermediate with a broad spectrum of industrial applications. Its unique chemical structure and reactivity make it indispensable in the manufacturing of dyes, pigments, pharmaceuticals, and agrochemicals. Understanding its chemical properties, synthesis, and handling is crucial for professionals involved in its procurement and utilization. This article aims to provide a comprehensive overview of BON Acid for industry stakeholders.

Key Chemical Properties of BON Acid

BON Acid is typically supplied as a light yellow to beige-brown fine crystalline powder. Its molecular formula is C11H8O3, with a molecular weight of 188.18 g/mol. A significant characteristic is its melting point, which is approximately 218-221 °C. This high melting point indicates a stable solid form under ambient conditions. The compound exhibits limited solubility in water, characteristic of many aromatic carboxylic acids, but its alkaline solutions display a distinct green fluorescence. Key impurities, such as Bata-Naphthol content, are closely monitored in commercial grades, with typical specifications limiting it to ≤0.5% for high-quality material. The purity of commercial BON Acid is generally guaranteed to be ≥98.5%.

Industrial Synthesis Methods

The primary industrial method for producing 3-Hydroxy-2-naphthoic Acid is the Kolbe-Schmitt reaction. This process involves the carboxylation of sodium 2-naphthoxide with carbon dioxide at elevated temperatures (220–260 °C). While straightforward in principle, optimizing this reaction to achieve high yields and purity, while minimizing byproduct formation, requires precise control over reaction parameters and efficient separation techniques. Continuous improvements in process technology aim to enhance conversion rates and reduce energy consumption, making the production more economically viable and environmentally friendly.

Industrial Significance and Applications

The primary industrial driver for BON Acid demand is its role as an intermediate for the production of organic pigments and dyes. It is fundamental in creating azo pigments that offer brilliant color shades, excellent lightfastness, and chemical resistance, making them ideal for printing inks, coatings, plastics, and textiles. Beyond the color industry, BON Acid serves as a versatile building block in the synthesis of pharmaceutical intermediates and certain agrochemicals, contributing to the development of medicines and crop protection solutions.

Procurement and Handling Advice

For businesses looking to purchase 3-Hydroxy-2-naphthoic Acid, partnering with a reliable manufacturer is key. As a leading supplier, we offer high-purity BON Acid (CAS 92-70-6) and are committed to providing detailed technical data, including Material Safety Data Sheets (MSDS) and Technical Data Sheets (TDS), to ensure safe and effective handling. We encourage you to contact us for competitive pricing and to secure a consistent supply of this essential chemical intermediate for your manufacturing processes.