EDTA

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Ethylenediamine tetraacetic acid (EDTA) is an organic compound with the chemical formula C10H16N2O8 and is a white powder at room temperature and pressure. It is a chelating agent that can bind with Mg2+, Ca2+, Mn2+, Fe2+ and other bivalent metal ions. Mg2+ is often used as an inhibitor of nucleases and proteases because most nucleases and some protein enzymes require Mg2+. It can also be used to remove the inhibition of heavy metal ions on enzymes.