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Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents
Salts of Phosphonates
Polycarboxylic Antiscalant and Dispersant
Biocide and Algicide
Reverse Osmosis Chemicals
Built Scale & Corrosion Inhibitors and Pretreatment Filming Agents
Corrosion Inhibitors & Oxygen Scavenger
Surfactant & Others

Amino Trimethylene Phosphonic Acid (ATMP)

CAS No. 6419-19-8 EINECS No. 229-146-5
Molecular Formula N(CH2PO3H2)3 Molecular Weight 299.05
Structural Formula

atmp Structural Formula

Product Features

ATMP is an organophosphonate exhibiting excellent sequestration of metal ions and threshold inhibition of metal salt precipitation. ATMP is a good complexing agent and a universally applicable inhibitor for various scale. ATMP has excellent chelation, low threshold inhibition and lattice distortion.

Technical Specification

Parameter Standard
Liquid Liquid
Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
Active content, % 50.0 min 95.0 min
Chloride (as Cl-), % 1.0 max 1.0 max
pH (1% water solution) 2.0 max 2.0 max
Fe, mg/L 20.0 max 20.0 max
Density (20℃), g/cm3 1.30 min -

Applications & Usage

ATMP is widely used in applications including boiler water treatment, cooling water treatment, industrial and institutional cleaning, oilfield water treatment and general-purpose metal ion control.

ATMP 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. The amount of 1-20mg/L is preferred; in an amount of 20-60mg/L when used as corrosion inhibitor.

Scale & 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 Liquid ATMP Solid
25L Drum 200L Drum 1000L IBC ISO Tank 25kg Bag Bulk Bag
25kg Bag 200L Drum packaging 1000L IBC packaging
Storage for 10 months in shady room and dry place.

Hazard & Safety Precaution

Hazard Information Safety Precaution

Corrosive, Class 8, UN 3265 Corrosive, Class 8, UN 3265

Wear protective gloves Wear protective goggles Wear protective clothing

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

Alternative Name / Synonyms

  1. ATMPA;
  2. AMP;
  3. Amino Trimethylene Phosphonic Acid;
  4. Amino Tri(Methylene Phosphonic Acid);
  5. Tris(Methylene Phosphonic Acid) Amine;
  6. Nitrilotrimethylphosphonic Acid(NTP);
  7. Nitrilotrimethylphosphonic Acid(NTP);
  8. Nitrilotrimethylenetris(Phosphonic Acid);
  9. Нитрилотриметилфосфоновая кислота(НТФ -кислота)
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