Disodium edetate dihydrate is widely used as a chelating agent in pharmaceuticals, cosmetics, and food products. It binds metal ions such as calcium, magnesium, iron, and copper, preventing them from catalyzing degradation reactions. In injectable medications, it enhances stability by inactivating trace metal contaminants. It is also used in ophthalmic solutions to improve shelf life and reduce irritation by sequestering metal ions. In cosmetics, it improves the effectiveness of preservatives and maintains product clarity. Additionally, it is employed in some food products to preserve color and flavor by inhibiting metal-induced oxidation. Its ability to form stable complexes makes it valuable in analytical chemistry and water treatment for controlling metal ion activity.