In the world of food science and technology, food additives play a crucial role in enhancing the quality, safety, and longevity of food products. Among these additives, E450a, also known as diphosphates or disodium diphosphate, occupies a significant place. As a member of the phosphate family, E450a is primarily used as a food stabilizer, emulsifier, and thickening agent. This article delves into the characteristics, applications, and safety considerations of E450a in food products.