1-Hydroxyethylidene-1 (HEDP) is a white crystalline powder or light yellow transparent liquid with a melting point of 198-199℃. Soluble in water, methanol, and ethanol. It is an organic phosphonic acid scale inhibitor and corrosion inhibitor, which can form stable complexes with iron, copper, zinc and other metal ions and dissolve oxides on the metal surface.
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