Sodium p-toluenesulfonate

Sodium p-toluenesulfonate (CAS 657-84-1), also known as sodium tosylate, is an aromatic sulfonate salt used across industrial and specialty chemical applications. It functions primarily as a hydrotrope, coupling agent, and catalyst precursor in aqueous and solvent-based systems. In textile and leather processing, it improves dye solubility and penetration, enabling more uniform color uptake across fiber substrates. Coatings and ink formulations use it as a hydrotrope to stabilize pigment dispersions and prevent phase separation.

Personal care manufacturers incorporate it into surfactant blends to adjust viscosity and enhance the solubility of active ingredients in cleansing and conditioning products. It also serves as a precursor or co-catalyst in synthesis processes where a stable source is required. Sodium p-toluenesulfonate is available as a white crystalline powder or granule, with both anhydrous and hydrate forms supplied commercially. Standard grades include technical and high-purity specifications for various industrial needs.

Select suppliers offer material conforming to reagent-grade standards for synthesis applications. Typical packaging ranges from 25 kg bags to bulk quantities suited for industrial procurement volumes and large-scale manufacturing operations. The material is valued for its ability to increase the solubility of organic compounds in water. This makes it an essential component in heavy-duty liquid detergents and various chemical processing environments where phase stability is critical.

As a versatile chemical intermediate, it supports the production of diverse specialty chemicals. Its role as a hydrotrope ensures that complex formulations remain homogeneous under varying temperature and concentration conditions during storage and use.