For professionals in the chemical and dye industries, a thorough understanding of key intermediates is crucial for successful product development and manufacturing. 6-Hydroxynaphthalene-2-sulfonic acid, commonly known by its trivial name Schaeffer's acid (CAS 93-01-6), is a prominent naphthalene derivative that plays a vital role in the production of numerous dyes and related chemical compounds. This article aims to provide a detailed overview of its properties, applications, and guidance for B2B procurement.

Schaeffer's acid is characterized by its unique molecular structure, featuring a hydroxyl group and a sulfonic acid group attached to a naphthalene ring. This arrangement imparts specific reactivity, making it an excellent coupling component for diazotization reactions. Its chemical formula is C10H8O4S, with a molecular weight of approximately 224.23 g/mol. Physically, it is typically supplied as a white to yellow powder. While its melting point is stated to be above 300°C, its solubility in water, especially its sodium salt, is a key property for its application in aqueous dye baths.

The primary application of 6-hydroxynaphthalene-2-sulfonic acid is as a key intermediate in the synthesis of azo dyes. It is employed in the production of dyes such as C.I. Acid Orange 12, C.I. Food Yellow 3, and C.I. Food Orange 2, among others. Its ability to form stable azo linkages results in dyes with good tinctorial strength and various fastness properties suitable for textiles, leather, and paper. Furthermore, it serves as a precursor for more complex dye intermediates and synthetic tanning agents, highlighting its versatility in chemical synthesis.

When sourcing 6-hydroxynaphthalene-2-sulfonic acid for industrial purposes, B2B buyers typically look for reliable suppliers who can guarantee consistent quality and competitive pricing. China is a significant global hub for the production of fine chemicals and intermediates, making Chinese manufacturers a primary target for procurement. When evaluating suppliers, it is essential to consider factors beyond just the listed price. These include:

  • Product Purity and Specifications: Ensure the purity meets the requirements for your specific application. Always request a Certificate of Analysis (CoA).
  • Supply Chain Reliability: Assess the supplier's production capacity, lead times, and logistical capabilities to ensure consistent availability.
  • Technical Support: A responsive supplier offering technical assistance can be invaluable for troubleshooting or optimizing application processes.
  • Regulatory Compliance: Verify that the product and supplier adhere to relevant industry regulations and safety standards.

Procurement managers should engage in thorough due diligence, comparing quotes and product details from multiple qualified vendors. For those looking to buy Schaeffer's acid, establishing a partnership with a reputable Chinese chemical supplier can provide a significant advantage in terms of cost and accessibility. These partnerships ensure that you receive high-quality intermediates, enabling you to maintain efficient production schedules and deliver excellent end-products to your customers.

In conclusion, 6-hydroxynaphthalene-2-sulfonic acid is a fundamental chemical intermediate with widespread use in the dye industry. Understanding its properties and applications, and employing a strategic approach to sourcing from reliable manufacturers and suppliers, is key for any B2B organization in this sector. Contact us to learn more about our offerings and to secure a dependable supply of this essential chemical.