One of the primary applications of sodium alkyl naphthalene sulfonates (SANS) is as a wetting agent in various industries. Their ability to lower the surface tension of liquids and improve the wetting of solid surfaces makes them particularly useful as wetting agents.

In the textile industry, Sodium alkyl naphthalene sulphonate are widely used as wetting agents in the dyeing and finishing processes. They help to improve the wetting and penetration of dyes and finishing agents into the fibers, ensuring uniform and even coloring or finishing. This is particularly important for hydrophobic fibers like polyester, where SANS can help overcome the poor wetting properties.

In the paints and coatings industry, SANS are employed as wetting agents to improve the spreadability and adhesion of paints and coatings on various substrates. They help reduce the surface tension of the paint or coating formulation, allowing better wetting and spreading, leading to a more uniform and defect-free coating.

In the concrete industry, SANS are used as wetting agents in concrete admixtures. They improve the wetting of cement particles and other components in the concrete mix, enhancing workability, dispersibility, and air entrainment properties.

SANS are also used as wetting agents in various cleaning formulations, such as household and industrial cleaners, dishwashing liquids, and laundry detergents. They help to improve the wetting and penetration of the cleaning solutions, enhancing their effectiveness in removing dirt, grease, and stains from surfaces.

The excellent wetting abilities of SANS, combined with their dispersing and emulsifying properties, make them versatile surfactants suitable for various applications where improved wetting is desired.