In the dynamic world of textiles and coatings, the brilliance and durability of colors are often attributed to sophisticated chemical intermediates. Among these, 6-Amino-1-naphthalenesulfonic Acid, commonly known by its CAS number 81-05-0, stands out as a fundamental component for a broad spectrum of dyes. Manufacturers and formulators rely on this compound to achieve specific color properties and application performance across various industries. Understanding its significance and availability is key for any procurement manager or R&D scientist in the field.

Chemical Profile and Specifications

6-Amino-1-naphthalenesulfonic Acid (CAS 81-05-0) is a naphthalene derivative characterized by its white crystalline powder appearance. Its chemical structure, C10H9NO3S, makes it a versatile precursor. When sourcing this material, buyers prioritize high purity, typically 98% minimum by HPLC, low moisture levels, and minimal insoluble matter. These precise specifications ensure that the compound will behave predictably in complex synthesis pathways, preventing unwanted side reactions and guaranteeing the quality of the final dye product. If you're looking to purchase this essential chemical, always verify these critical parameters.

Applications Across Dye Classes

The primary utility of 6-Amino-1-naphthalenesulfonic Acid lies in its role as an intermediate for several major dye classes:

  • Acid Dyes: These water-soluble anionic dyes are widely used for coloring protein fibers like wool and silk, as well as synthetic fibers such as nylon and acrylic. The sulfonic acid group contributes to solubility and affinity for these fibers.
  • Reactive Dyes: Known for their ability to form covalent bonds with textile fibers (especially cotton), reactive dyes offer excellent wash fastness. 6-Amino-1-naphthalenesulfonic Acid serves as a key component in constructing the chromophore and reactive groups.
  • Indirect Dyes: This category encompasses dyes that require a mordant or specific application conditions to fix onto the fiber. The structural versatility of the naphthalene core is advantageous here.

Its molecular structure allows for functionalization and participation in the azo coupling reactions that are central to chromophore development, making it a sought-after raw material for dye manufacturers globally.

Procurement: Finding Reliable Suppliers

For companies requiring a steady supply of 6-Amino-1-naphthalenesulfonic Acid, identifying reliable manufacturers and suppliers is crucial. China is a dominant force in the global chemical market, offering numerous opportunities to source this intermediate. When considering a supplier, due diligence is essential. Look for companies with established quality control systems, consistent production capabilities, and a proven track record. Requesting quotes from multiple reputable manufacturers and comparing their offerings, including price, purity, and delivery terms, is a prudent approach.

Beyond the chemical’s specifications, consider the supplier’s responsiveness, customer service, and commitment to international standards. A good supplier will readily provide technical documentation and support, helping you integrate the chemical seamlessly into your production workflow. For purchasing decisions, always seek clarity on packaging (e.g., 25kg drums) and storage advice to maintain product integrity.