EDTMP

EDTMP

IUPAC name [bis(phosphonomethyl)amino]methylphosphonic acid
Other names Ethylenediamine tetra(methylene phosphonic acid), EDTMP
Identifiers
CAS number	1429-50-1^Y
PubChem	15025
ChemSpider	14301^Y
UNII	V4CP8RSX7V^Y
Jmol-3D images	Image 1
SMILES O=P(O)(O)CN(CP(=O)(O)O)CCN(CP(=O)(O)O)CP(=O)(O)O
InChI InChI=1S/C6H20N2O12P4/c9-21(10,11)3-7(4-22(12,13)14)1-2-8(5-23(15,16)17)6-24(18,19)20/h1-6H2,(H2,9,10,11)(H2,12,13,14)(H2,15,16,17)(H2,18,19,20)^Y Key: NFDRPXJGHKJRLJ-UHFFFAOYSA-N^Y InChI=1/C6H20N2O12P4/c9-21(10,11)3-7(4-22(12,13)14)1-2-8(5-23(15,16)17)6-24(18,19)20/h1-6H2,(H2,9,10,11)(H2,12,13,14)(H2,15,16,17)(H2,18,19,20) Key: NFDRPXJGHKJRLJ-UHFFFAOYAV
Properties
Molecular formula	C₆H₂₀N₂O₁₂P₄
Appearance	solid
Solubility in water	limited
Y (verify) (what is: Y/N?) Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

EDTMP or ethylenediamine tetra(methylene phosphonic acid) is a phosphonic acid. It has chelating and anti corrosion properties. EDTMP is the phosphonate analog of EDTA.

Properties

EDTMP is normally delivered as salts, due to the acid form has very limited solubility in water. It is a nitrogenous organic polyphosphonic acid. Its corrosion inhibition is 3-5 times better than that of inorganic polyphosphate, has good chemical stability and thermal tolerance. It shows excellent scale inhibition ability under temperature 200 °C. It 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. EDTMP shows better antiscale effects to calcium sulfate and barium sulfate.

Applications

Detergents and cleaning agents
Water treatment
Scaling inhibitor
Chelating agent
- in the anti-cancer drug Samarium (¹⁵³Sm) lexidronam
Deflocculant / settling retarder
Anti corrosion agent