Ethylene DiamineTetra (Methylene Phosphonic Acid) EDTMPA 

Ethylene DiamineTetra (Methylene Phosphonic Acid) sodium , also call EDTMPS, its cas no. is 1429-50-1,  which is nitrogenous organic polyphosphonic acid, a part of cathodic corrosion inhibitor. Its corrosion inhibition is 3~5 times better than that of inorganic polyphosphate. Ethylene DiamineTetra (Methylene Phosphonic Acid) sodium/EDTPMPS shows excellent scale inhibition ability under temperature 200℃. Ethylene DiamineTetra (Methylene Phosphonic Acid) sodium/EDTPMPS can dissociate into 8 positive-negative ions, thus can chelate with many metal ions to form polymer reticulation complex, to destroy the normal crystallization of calcium scale. Ethylene DiamineTetra (Methylene Phosphonic Acid) sodium/EDTPMPS shows better antiscale effects to calcium sulfate and barium.