Naphthol AS, identified by its CAS number 92-77-3, is a cornerstone chemical intermediate with significant applications in both the pigment and textile industries. Its unique chemical properties and reactivity make it indispensable for creating vibrant colors and achieving specific dyeing effects. As a prominent manufacturer and supplier of fine chemicals, we are dedicated to providing detailed insights into our products, including Naphthol AS, to aid your technical and procurement decisions.

The physical characteristics of Naphthol AS are fundamental to its utility. It typically presents as an off-white powder with an assay purity of ≥99%. This high purity is crucial for ensuring predictable chemical reactions and optimal performance in its end applications. Its melting point is notably high, around 247°C, indicating its thermal stability. Understanding these physical attributes helps in handling, storage, and processing.

Solubility is another key property. Naphthol AS exhibits specific solubility behaviors: it is soluble in nitrobenzene, slightly soluble in ethanol, and insoluble in water and soda solutions. However, it dissolves in caustic soda solutions to produce a yellow hue. This differential solubility is leveraged in various chemical processes, particularly in the azoic dyeing method, where controlled dissolution and precipitation on the fiber are essential for color formation.

The primary application of Naphthol AS lies in its role as an intermediate for the production of organic pigments. When coupled with diazonium salts, it forms a range of stable azo pigments that are essential for paints, inks, plastics, and coatings. The quality of the Naphthol AS directly influences the color intensity, lightfastness, and chemical resistance of the final pigment. Manufacturers rely on high-grade Naphthol AS to produce pigments that meet stringent industry standards.

In the textile sector, Naphthol AS is a vital component in azoic dyeing and printing. It is extensively used for cotton fibers, viscose fibers, and some synthetic fibers. The process involves impregnating the fiber with Naphthol AS, followed by treatment with a diazo component to generate the insoluble dye in situ. This method yields deep, vibrant shades with excellent fastness properties, making it a preferred choice for achieving durable and visually appealing textile coloration. As a supplier, we ensure that our Naphthol AS is optimized for these applications, providing textile manufacturers with a reliable ingredient.

For those looking to purchase Naphthol AS, understanding these properties and applications is key to making informed decisions. As a leading chemical manufacturer and supplier, we offer Naphthol AS that adheres to the highest quality standards. We invite you to contact us for detailed specifications, pricing inquiries, and to discuss how our Naphthol AS can support your specific needs in pigment synthesis or textile coloration.