Sodium D-lactate is widely used in the food industry as a preservative and flavor enhancer. It helps extend the shelf life of products by inhibiting the growth of bacteria and other microorganisms. Additionally, it is utilized in the production of baked goods, dairy products, and beverages to improve texture and stability.

In the pharmaceutical sector, it serves as an excipient in drug formulations, aiding in the stabilization and delivery of active ingredients. It is also employed in medical solutions, such as intravenous fluids, to maintain electrolyte balance in patients.

In cosmetics and personal care products, Sodium D-lactate acts as a humectant, helping to retain moisture in the skin. It is commonly found in lotions, creams, and serums to enhance hydration and improve skin elasticity.

Furthermore, it is used in industrial applications, including as a biodegradable cleaning agent and in the production of biodegradable plastics, contributing to environmentally friendly solutions.