Water Treatment Chemicals, Phosphonates, Polymers, Biocides


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Organophosphoric Antiscale and Corrosion Inhibitors, Chelant

Amino Trimethylene Phosphonic Acid

CAS No.  6419-19-8

Molecular Formula: N(CH2PO3H2)3

Molecular weight: 299.05

Structural Formula:

Amino Trimethylene Phosphonic Acid (ATMP) Structural Formula


Amino Trimethylene Phosphonic Acid has excellent chelation, low threshold inhibition and lattice distortion ability. ATMP can prevent scale formation, calcium carbonate in particular, in water system. Amino Trimethylene Phosphonic Acid has good chemical stability and is hard to be hydrolyzed in water system. At high concentration, ATMPA has good corrosion inhibition.

ATMP is used in industrial circulating cool water system of thermal power plant and oil refinery plant. ATMP can decrease scale formation and inhibit corrosion of metal equipment and pipeline. ATMPA can be used as chelating agent in woven and dyeing industries and as metal surface treatment agent.

The solid state of Amino Trimethylene Phosphonic Acid is crystal powder, soluble in water, easily deliquescence, suitable for usage in winter and freezing districts. Because of its high purity, ATMPA can be used in woven & dyeing industries and as metal surface treatment agent.


items index
  Standard Solid
Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
Active acid % 50.0-51.0 95.0min
Chloride (as Cl-)% 1.0max 1.0 min
pH value (1% solution) 2.0 max 2.0 max
Fe,mg/L 10.0max 20.0max
Density (20℃)g/cm3 1.31-1.35 -
Colour APHA (Hazen) 30.0max -


ATMP is usually used together with organophosphoric acid, polycarboxylic acid and salt to built all organic alkaline water treatment agent. Amino Trimethylene Phosphonic Acid can be used in many different circulating cool water systems. The dosage of 1-20mg/l is recommended. As corrosion inhibitor, the dosage of 20-60mg/l is preferred.

Package and Storage:

Liquid: 200L plastic drum,IBC(1000L),customers’ requirement.
Solid: 25kg/bag,customers’ requirement.

Storage for ten months in room shady and dry place.

Safety Protection:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.


Amino Trimethylene Phosphonic Acid Chemicals
Tetra sodium salt of Amino Trimethylene Phosphonic Acid (ATMP·Na4)
Penta sodium salt of Amino Trimethylene Phosphonic Acid (ATMP·Na5)
Potassium salt of Amino Trimethylene Phosphonic Acid (ATMP•Kx)

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Shandong IRO Water Treatment Co., Ltd.

Office Address: 2802, 1st Building, No.19 Zhangzhou 2nd Rd, Qingdao, China
Factory Address: Qicun Town, Shizhong, Zaozhuang, Shandong, China
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Email: info@irowater.com

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