Disodium edetate dihydrate is widely used as a chelating agent in pharmaceuticals, cosmetics, and food products. It binds to metal ions such as calcium, magnesium, iron, and copper, preventing them from catalyzing degradation reactions. In injectable medications, it enhances stability by sequestering trace metal contaminants that could otherwise promote oxidation. It is also used in ophthalmic solutions to inactivate metal ions and improve shelf life. In the food industry, it serves as a preservative by inhibiting metal-induced discoloration and rancidity. In cosmetics, it improves product stability by preventing metal-dependent degradation of active ingredients and emulsions. Additionally, it is used in water treatment and cleaning products to soften water by binding metal ions that cause hardness. Its ability to form stable complexes makes it valuable in analytical chemistry and metal decontamination processes.