Water Treatment Chemicals, Phosphonates, Polymers, Biocides

Organophosphoric Antiscale and Corrosion Inhibitors, Chelant

Ethylene Diamine Tetra Methylene Phosphonic Acid, EDTMP

CAS No. 1429-50-1

Molecular Formula: C6H20 N2O12P4

Molecular weight: 436.13

Structural Formula:

Ethylene Diamine Tetra (Methylene Phosphonic Acid) EDTMPA Structural Formula


EDTMP is white crystal powder at room temperature, with melting point 215-217℃, hard to be dissolved in water, the solubility is less that 5% at room temperature, easy dissolved in ammonia. EDTMP has strong metal ion chelating capacity, whose chelating constant with cuprum ion is larger than that of edta.

EDTMP has high capacity for chelating metal ions. The complex constant with cu is the largest in all chelating agents including edta. EDTMP is a kind of high-pure grade reagent and innocuous, it can be used as detergent in semiconductor chip to prepare integrated circuit, as carrying agent for radioelement in medical industry, and as agent for inspection and therapy. The chelating capacity of EDTMP largely exceed that of edta and dtpa, and can replace edta for chelating agent at almost any situation.


items index
Appearance White crystal powder
Active acid % 96.0 min
Total phosphonic acid(as PO43-)% 82.0 min
Moisture % 2.0 max
Fe,mg/L 5 max
Chloride (Cl-) % 0.1 max
pH(1% solution) 2.0 max

Package and Storage:

25kg/bag,customers’ requirement.Storage for one year in shady room and dry place.


EDTMP Sodium
Diethylene Triamine Penta Methylene Phosphonic Acid

Shandong IRO Water Treatment Co., Ltd.

Office Address: 2802, 1st Building, No.19 Zhangzhou 2nd Rd, Qingdao, China
Factory Address: Qicun Town, Shizhong, Zaozhuang, Shandong, China
Tel: +86-532-85027466 Fax: +86 532 85028486
Email: info@irowater.com

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