For chemists, formulators, and procurement specialists, the detailed specifications of a chemical intermediate are the blueprint for successful product development and consistent manufacturing outcomes. Disodium 1-Naphthol-3,6-disulfonic Acid (CAS 20349-39-7) is no exception. As a vital component in dye, pigment, and textile industries, understanding its key characteristics ensures optimal performance and avoids costly production errors.

Decoding the Specifications

When you look to buy Disodium 1-Naphthol-3,6-disulfonic Acid, a few critical specifications will typically be provided by a reputable manufacturer or supplier:

• Chemical Name & Synonyms: While the primary name is Disodium 1-Naphthol-3,6-disulfonic Acid, it's often known by synonyms such as 4-Hydroxy-2,7-naphthalenedisulfonic acid disodium salt, Violet Acid Disodium Salt, or Rudolf Guercke Acid Disodium Salt. Always cross-reference with the CAS Number (20349-39-7) for definitive identification.
• Purity: This is arguably the most critical parameter. Typically, this intermediate is offered at purities of 95%, 97%, or 99%. For most demanding applications, especially in fine chemical synthesis and high-performance dyes, 99% purity is preferred to minimize impurities and side reactions. Manufacturers like NINGBO INNO PHARMCHEM CO.,LTD. emphasize high purity standards.
• Appearance: The material is commonly described as a pinkish-grey presscake or a grey to brownish powder. Consistency in appearance can be an initial indicator of batch-to-batch quality control.
• Molecular Formula & Weight: C10H6Na2O7S2, with a molecular weight of approximately 348.25 g/mol. This information is fundamental for stoichiometric calculations in chemical reactions.
• CAS Number: 20349-39-7. This is the unambiguous identifier for the chemical substance.
• Solubility: High water solubility (e.g., 1000g/L at 25℃) is a key characteristic, enabling its effective use in aqueous dyeing baths and other wet chemical processes.

Why Quality Matters for Your Business

Utilizing Disodium 1-Naphthol-3,6-disulfonic Acid with guaranteed specifications ensures:

• Predictable Reaction Yields: High purity minimizes unwanted by-products, leading to higher yields of your target dyes or pigments.
• Consistent Color Performance: Impurities can alter the final color shade or fastness properties, affecting the quality of your end products.
• Process Efficiency: Reliable material means fewer batch failures and less need for reprocessing, saving both time and resources.

When sourcing this chemical from China, engaging with suppliers who transparently provide detailed Certificates of Analysis (CoA) for each batch is essential. This documentation confirms that the product meets the stated specifications. For procurement managers, understanding these details empowers them to make informed purchasing decisions, ensuring they receive the quality they need at a fair price.