Disodium 4-dodecyl-2,4'-oxydibenzenesulfonate is primarily used as a surfactant in cleaning products, where it effectively reduces surface tension, enhancing the cleaning power of detergents, soaps, and dishwashing liquids by emulsifying oils and suspending dirt for easier removal. It is also employed in personal care products, such as shampoos and body washes, to improve lather and spreadability, and its emulsion-stabilizing properties make it valuable in cosmetics and toiletries. Additionally, in the textile industry, it helps coat fabrics with water-repellent agents for better performance. In paper production, it improves paper quality, resulting in smoother and more durable surfaces.