Fumaric acid potassium is widely used in the food industry as an acidity regulator and preservative. It helps maintain the desired pH level in various food products, enhancing their shelf life and stability. It is commonly found in baked goods, beverages, and processed foods to improve flavor and texture. Additionally, it is utilized in pharmaceutical formulations as a buffering agent to control the acidity of medications. In agriculture, it serves as a supplement in animal feed to promote better digestion and nutrient absorption. Its role in industrial applications includes acting as a catalyst or intermediate in chemical synthesis processes.