The chemical industry constantly seeks efficient and reliable intermediates for synthesizing complex compounds. Among these, 2-Aminonaphthalene-1-sulfonic acid (CAS 81-16-3), also known as Tobias Acid, holds significant importance, particularly within the dye and pigment manufacturing sectors. Its unique chemical structure and reactivity make it a vital component in producing a wide range of colored materials that are essential across various industries, most notably textiles.

The synthesis of 2-Aminonaphthalene-1-sulfonic acid typically involves heating 2-hydroxynaphthalene-1-sulfonic acid with a mixture of ammonia and ammonium sulfite under specific temperature and pressure conditions. This process yields the acid, which is then purified. The resulting product is characterized by its white, needle-like crystalline appearance. Its solubility profile – slightly soluble in cold water, soluble in hot water, and very slightly soluble in ethanol and ether – dictates handling and processing conditions.

The primary application of 2-Aminonaphthalene-1-sulfonic acid lies in its role as an intermediate for azo dyes and pigments. It is a crucial precursor for synthesizing dye intermediates such as J acid and gamma acid. These compounds, in turn, are used to manufacture a vast array of dyes that impart color to textiles, paper, and other materials. For example, it is essential for producing specific dyes like chromol AS-SW and reactive red K-1613, which are valued for their brilliance and performance characteristics. The ability to reliably buy 2-aminonaphthalene-1-sulfonic acid of high purity is therefore critical for dye manufacturers.

For R&D scientists and procurement managers, understanding the specifications such as a minimum assay of 99.0% is key to ensuring successful dye synthesis. When seeking to purchase this essential chemical, partnering with a reputable manufacturer that can guarantee quality and consistent supply is paramount. Many leading chemical companies in China offer this product, providing competitive pricing and online support for inquiries. If you are looking to enhance your dye formulations or explore new pigment possibilities, investigating the offerings from a reliable 2-aminonaphthalene-1-sulfonic acid supplier is a strategic move. Enquire today to secure the quality materials you need for your innovative chemical solutions.