EDTA - Definition

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EDTA, or ethylenediaminetetraacetic acid, is a water-soluble acid whose melting point is 237°C, or 458.6°F. EDTA is a highly toxic substance used in the fields of printing, hygiene and photography. When its concentration permits, EDTA is also used as a food preservative. A stabilizer in cosmetics, it also purifies certain acids such as DNA, which makes it a valuable aid in biochemistry. In medicine, this substance is used to fight excess iron.