EDTMPA (Solid) (Ethylene Diamine Tetra (Methylene Phosphonic Acid)) CAS 1429-50-1 Similar to Dequest: 2040 (through the mail address (rita at thwater dot com) to contact with me directly for the item) EDTMPA is white crystal powder at room temperature, with melting point 215-217centigrade, hard to be dissolved in water, the solubility is less that 5percent at room temperature, easy dissolved in ammonia. EDTMPA has strong metal ion chelating capacity, whose chelating constant with cuprum ion is larger than that of EDTA. EDTMPA has high capacity for chelating metal ions. The complex constant with Cu is the largest in all chelating agents including EDTA. EDTMPA is a kind of high-pure grade reagent and innocuous, EDTMPA 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 EDTMPA largely exceed that of EDTA and DTPA, and can replace EDTA for chelating agent at almost any situation. Specification of EDTMPA: Appearance of EDTMPA: White crystal powder Active acid of EDTMPA : 95.0percent min Total phosphonic acid of EDTMPA (as PO43-): 82.0percent min Dryness weight loss of EDTMPA : 2.0 percent max Fe of EDTMPA: 5 ppm max Cl percent of EDTMPA: 0.1 max pH of EDTMPA (1percent solution) :2.0 max Our company can produce 99percent (chromatograph purity) and high purity product on demand of clients. Package and Storage of EDTMPA: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, with agreement with export environment requirement, or confirmed by clients. Storage for one year in room shady and dry place (through the mail address (rita at thwater dot com) to contact with me directly for the item)