Sodium propionate is widely used as a preservative in the food industry, particularly in baked goods like bread, cakes, pastries, and dairy products such as butter and cheese. It helps prevent the growth of mold and bacteria, extending the shelf life of these products. In animal feed, it is added to inhibit microbial growth, ensuring the feed remains safe and fresh for consumption. Additionally, it is utilized in certain pharmaceuticals to maintain the stability and efficacy of medications by preventing microbial contamination. Its antifungal properties also make it suitable for use in cosmetics and personal care products to protect against spoilage.