The chemical industry relies heavily on specialized intermediates to create the vast array of products we use daily. For manufacturers in the dye and pigment sector, 6-Amino-1-naphthalenesulfonic Acid, identified by its CAS number 81-05-0, is a particularly important compound. Its unique chemical structure makes it a versatile precursor for synthesizing a wide range of vibrant and durable dyes. Procurement professionals and R&D scientists often seek out reliable suppliers to ensure consistent quality and availability.

Product Overview: 6-Amino-1-naphthalenesulfonic Acid

This chemical is typically supplied as a white crystalline powder, with a molecular formula of C10H9NO3S and a molecular weight of 223.25. Common synonyms include Dahl's Acid and D Acid. For industrial applications, especially in dye synthesis, key quality parameters are critical. Manufacturers typically guarantee a minimum purity of 98%, often verified through High-Performance Liquid Chromatography (HPLC). Additionally, low moisture content (≤0.1%) and minimal insoluble matter (≤0.1%) are essential for predictable reaction behavior and high-quality end products. When you plan to buy this product, always confirm these specifications with your supplier.

Key Applications in Dye Manufacturing

The value of 6-Amino-1-naphthalenesulfonic Acid lies in its broad utility across different dye classes:

  • Acid Dyes: Essential for creating dyes used in textiles like wool, silk, and nylon, providing brilliant colors and good wash fastness.
  • Reactive Dyes: Crucial for covalent bonding with cellulosic fibers such as cotton, leading to exceptional color durability.
  • Indirect Dyes: Utilized in formulations that require specific application methods or mordants for fiber attachment.

The presence of both an amino group and a sulfonic acid group on the naphthalene ring system allows for diverse chemical transformations, making it a cornerstone intermediate for many dye manufacturers.

Selecting a Reliable Supplier

Finding a trusted supplier for chemical intermediates is key to operational success. For 6-Amino-1-naphthalenesulfonic Acid (CAS 81-05-0), manufacturers and distributors based in China are significant players in the global market. When evaluating potential partners, look for companies that:

  • Demonstrate a strong commitment to quality control, providing Certificates of Analysis (CoA) for their products.
  • Maintain consistent production capacity to meet your volume requirements.
  • Offer competitive pricing, especially for bulk orders.
  • Provide clear information on packaging (e.g., 25kg drums) and storage conditions.
  • Exhibit responsive customer service and technical support.

Engaging with suppliers that offer product samples allows for thorough in-house testing to confirm suitability for your specific formulations before making a substantial purchase commitment. This diligent approach ensures you secure a high-quality and reliably sourced intermediate.