EDTA disodium salt, also known as 乙二胺四乙酸二钠, is a type of chelating agent formed by a central metal ion chelated with four carboxylate groups and two amino groups. This compound is capable of binding and chelating metal ions such as calcium, magnesium, and iron, making it useful across industrial, medical, and research settings. In food and beverages, it serves as a preservative; in pharmaceuticals, it acts as a stabilizer; in water treatment, it functions as a chelating agent; and in biochemical and biomedical research, it is utilized as a reagent. Furthermore, EDTA disodium salt has been studied for potential roles in treating heavy metal poisoning and cardiovascular diseases.