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ATMP•Na5 Penta Sodium Salt of Amino Trimethylene Phosphonic Acid

CAS No. 20592-85-2 (x-Na), 2235-43-0 (5-Na)

Molecular Formula: C3H7NO9P3Na5         Molecular weight: 409

Structural Formula:



ATMP•Na5 is the salt of ATMP, it can inhibit calcium carbonate particularly in water treatment system . ATMP•Na5 can be used in circulating cool system in power plant, oil refinery plant and oilfield refill water system . ATMP•Na5 is a general low cost scale inhibitor, it has good corrosion inhibition to zinc salt and phosphate, its chelating ability is good as well.


AppearanceColorless to light yellow transparent liquid
Active content (ATMP), %27.8-30.7
Active content (ATMP•Na5), %38.0-42.0
Chloride (as Cl-), %1.0 max
PH (1% water solution)10.0-11.0
Fe, mg/L10 max
Density (20℃), g/cm31.38-1.48


ATMP•Na5 is used together with other organophosphonic acid, polycarboxylic acid or salt to form organic alkaline agents. ATMP•Na5 can be used in circulating cool water system for all water quality.

Package and Storage:

200L plastic drum,IBC(1000L),customers’ requirement. Storage for ten months in shady room and dry place.


Pentasodium hydrogen C,C',C''-nitrilotris(methylphosphonate)