Sodium 3-hydroxypropane-1-sulfonate, also known as sodium isethionate, is a specialty chemical primarily utilized as a mild surfactant and emulsifier in cosmetics and personal care products, including shampoos, body washes, and soaps. It provides gentle cleansing, excellent foaming properties, and skin conditioning benefits while being non-irritating and biodegradable. In the textile industry, it acts as a dyeing auxiliary to enhance color uniformity and fastness. It is also employed as an additive in the production of synthetic fibers and polymers to improve water solubility, physical properties, and durability. Additionally, in water treatment processes, it serves as a pH adjuster and dispersant to aid in contaminant removal and stabilize treatment chemicals.