Sodium 2-naphthalenesulfonate

Sodium 2-naphthalenesulfonate (CAS 532-02-5, EC 208-523-8), also referred to as sodium naphthalene sulfonate or sodium β-naphthalenesulfonate, is the sodium salt of 2-naphthalenesulfonic acid with molecular formula C10H8O3S.Na. It carries no assigned E-code and is classified under HS code 29041000.

In textile and leather processing, it functions as a dispersant and wetting agent by reducing interfacial tension between dye particles and fiber surfaces, improving dye uptake uniformity. In water treatment formulations, its surfactant activity supports emulsification of hydrophobic contaminants, while in coatings and adhesive systems it acts as a catalyst and surface modifier to promote adhesion and film formation.

This material is supplied as a white to pale grey powder and is registered under REACH. Procurement teams should confirm supplier compliance documentation, including Safety Data Sheets and certificates of analysis specifying purity grade. Standard packaging formats for industrial supply typically include 25 kg bags or bulk quantities on request.