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Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents
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Polycarboxylic Antiscalant and Dispersant
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Surfactant & Others

Tetra Sodium Salt of Amino Trimethylene Phosphonic Acid (ATMP.Na4)

CAS No. 20592-85-2 EINECE NO. 243-900-0
Molecular Formula C3H8NO9P3Na4 Molecular Weight 387
Structural Formula

ATMP.Na4 Structural Formula

Product Features

ATMP.Na4 is the fully neutralized form of ATMP. It is a cost-effective scale inhibitor based on ATMP acid. ATMP.Na4 can inhibit the scale formation in water system, calcium carbonate(CaCO3) especially. ATMP.Na4 can be used in circulating cooling water system in power plant, oil refinery plant and oilfield injection applications. ATMP.Na4 is preferred for use in neutral to acidic condition, no ammonia odor is generated.

Technical Specification

Parameter Standard
Appearance Colorless or light yellow transparent liquid
Active content(ATMP), % 29.4-32.4
Active content(ATMP•Na4), % 38.0-42.0
pH(1% water solution) 6.0-8.0
Fe, mg/L 10.0 max
Density (20℃), g/cm3 1.35-1.45

Applications & Usage

ATMP.Na4 is mostly used with organophosphoric acid, polycarboxylic acid and salt to form all organic water treatment formulation for various circulating cooling water systems with different water quality conditions. Neutralized form and has excellent CaCO3 scale inhibitor in oilfield applications. Compatible with other additives.

Scale and Corrosion inhibition Performance

CaCO3 inhibition CaSO4 inhibition CaC2O4 inhibition CaF2 inhibition
Excellent Good Very Good Excellent
Calcium Tolerance Iron Control Sequestration Steel corrosion inhibition
Good Yes Good Excellent

Package & Storage

ATMP.Na4 liquid
25L Drum 200L Drum 1000L IBC ISO Tank
Storage for ten months in shady room and dry place.

Hazard & Safety Precaution

Hazard Information Safety Precaution

Not regulated

Once contacted with eye and skin, flush with plenty of clean water.


  1. ATMP.Na4;
  2. CAS 20592-85-2