CAS number: 1429-50-1
C6H20N2O12P4
Chemical names
Ethylene Diamine Tetra (Methylene Phosphonic Acid); EDTMP; Ethylenediamine tetra (methylenephosphonic acid);
Ethylenebis(nitrilodimethylene)tetraphosphonic acid; EDPA; EDTPA;
Phosphonic acid, P,P′,P′′,P′′′-[1,2-ethanediylbis[nitrilobis(methylene)]]tetrakis-;
Phosphonic acid, [ethylenebis(nitrilodimethylene)]tetra-;
[2-[bis(phosphonomethyl)amino]ethyl-(phosphonomethyl)amino]methylphosphonic acid;
Sodium salts of EDTMP
CAS number 22036-77-7, Sodium salts of EDTMP, C6H20N2O12P4.xNa, EDTMPS ;
CAS number 57956-19-1, octasodium of EDTMP, 8Na-EDTMP;
CAS number 15142-96-8, hexasodium salt, 6Na-EDTMP;
CAS number 7651-99-2, pentasodium salt, 5Na-EDTMP;
CAS number 61827-49-4, EC / List number 263-254-3, tetrasodium of EDTMPA, 4Na-EDTMP;
Properties
Ethylenediaminetetra(methylenephosphonic acid), abbreviated EDTMPA.
EDTMP is an organophosphine chelating agent (sequestering agent, complexing agent), scale and corrosion inhibitor for water treatment.
Uses
EDTMP and its sodium salt are commonly used in circulating cool water treatment, boiler water treatment, cleaning and detergent, electronic chemicals, textile auxiliaries and other fields.
Technical data
EDTMP is white crystalline powder at room temperature, slightly soluble in water, soluble in ammonia.
EDTMPS sodium salts is often provided in liquid form.
| Appearance | White crystal powder |
| Active content [%] | ≥96 |
| Total phosphonic acid (as PO43-) [%] | ≥82 |
| Chloride (as Cl–) [%] | ≤0.1 |
| pH (1% water solution) | ≤2.0 |
| Iron (as Fe2+) [ppm] | ≤2.0 |
