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EDTMPA Ethylene Diamine Tetra (Methylene Phosphonic Acid) CAS 1429-50-1,Antiscalants Corrosion Inhibitors And Chelating Agentslink:http://www.yingxinwater.com/antiscalants-corrosion-inhibitors-and-chelating-ag/edtmpa-ethylene-diamine-tetra-methylene.html