Docusate sodium

Docusate sodium (CAS 577-11-7), also known as DSS and approved as E480 in food applications, is an anionic surfactant used across pharmaceutical, food, and industrial sectors. Its primary function is to lower surface and interfacial tension, enabling emulsification, wetting, and dispersing in formulations where conventional surfactants underperform in various environments.

In pharmaceuticals, DSS is the active ingredient in stool softener laxatives and is incorporated into tablet and capsule formulations as a wetting agent to improve drug dissolution rates. Food manufacturers use it as an emulsifier and dispersing aid in products such as gelled desserts, cocoa-based mixes, and sugar confectionery under its specific food additive designation.

In textile and paper processing, it acts as a penetrant and wetting agent, ensuring uniform dye uptake and consistent fiber saturation during the manufacturing and finishing stages. Industrial cleaning and degreasing formulations rely on DSS for its ability to emulsify oils and reduce foam in process water systems, providing high efficiency in technical applications.

Docusate sodium is supplied as a liquid solution, typically at 70% active content in water or ethanol, and as a dry powder or granule form for solid dosage manufacturing. Recognized grades include USP, BP, and Ph. Eur. for pharmaceutical procurement, as well as food-grade material meeting specific safety standards for industrial and textile applications.