For B2B procurement managers and research scientists in the chemical and textile sectors, a deep understanding of product specifications is crucial before making a purchase. Naphthol AS-D (CAS 135-61-5) is a prime example of a chemical intermediate where precise specifications directly correlate with its performance in industrial applications, particularly in dye synthesis and textile coloration. Sourcing from a trusted Naphthol AS-D manufacturer and supplier ensures these critical details are met.

The most significant specification for Naphthol AS-D is its purity, often expressed as an assay percentage. Industrial buyers typically seek Naphthol AS-D with an assay of 99% or higher. This high purity is essential for the successful synthesis of insoluble azo dyes, where even minor impurities can affect the reaction yield, color intensity, and the fastness properties of the final dye. A reliable Naphthol AS-D supplier will clearly state their product’s assay and provide supporting documentation.

Appearance is another important visual indicator. Naphthol AS-D is commonly described as an ecru powder. While minor variations in shade can occur, significant deviations from this description might suggest issues with the manufacturing process or product degradation. Buyers should confirm the expected appearance with their Naphthol AS-D manufacturer to set clear quality expectations.

Other critical specifications often include the melting point, which for pure Naphthol AS-D typically falls within the range of 194-198°C. This physical property can serve as a quick check for product identity and purity. Additionally, information regarding solubility in various solvents and its behavior in acidic or alkaline solutions can be vital for formulation chemists planning its use in complex chemical reactions or dyeing baths.

When you decide to buy Naphthol AS-D, prioritize sourcing from reputable manufacturers and suppliers in China who are transparent about their product's specifications. This diligence ensures you are acquiring a chemical that meets industry standards, leading to predictable results in your applications and avoiding costly production errors. Investing in quality Naphthol AS-D from a dependable supplier is a key step towards operational excellence.