Nitrilo Trimethylene Triphosphonic Acid, Aminotrimethylene Phoshonic Acid, NTMP,  ATMP, ATMPA, 6419-19-8

Nitrilo Trimethylene Triphosphonic Acid, Aminotrimethylene Phoshonic Acid, NTMP,  ATMP, ATMPA, 6419-19-8

ATMP – Aminotris(methylenephosphonic acid)

General Information

• Chemical Name: Amino Trimethylene Phosphonic Acid (ATMP)

• Other Names: Aminotris, Methylenephosphonic Acid, NTMP

• Chemical Formula: C₃H₁₂NO₉P₃

• CAS Number: 6419-19-8

• Molecular Weight: 299.05 g/mol

• Appearance: White crystalline solid

• Density: 1.33 g/cm³ (20°C)

• Melting Point: ~200°C (decomposes)

• Solubility: Highly soluble in water (61 g/100 mL)

Properties

• Excellent chelating ability (binds Ca²⁺, Mg²⁺, Fe³⁺ ions).

• Threshold inhibition – effective at very low concentrations.

• Lattice distortion effect – prevents crystal growth of scale-forming salts.

• High chemical stability – resistant to hydrolysis in water systems.

• Functions as a scale inhibitor and corrosion inhibitor.

Applications

• Water Treatment: Cooling systems, boilers, oilfield pipelines, power plants, refineries.

• Textile Industry: Chelating agent in dyeing and finishing.

• Metal Surface Treatment: Prevents corrosion and scaling.

• Detergents & Cleaning Agents: Improves cleaning efficiency by preventing scale.

Phosphonates – Variants and CAS Numbers

Summary

• ATMP (CAS 6419-19-8) is the most widely used phosphonate for scale and corrosion inhibition.

• DTMPA, EDTMPA, PBTCA are specialized phosphonates with enhanced chelation, stability, and performance under different industrial conditions.

• Together, these compounds are essential in water treatment, detergents, textiles, coatings, and industrial cleaning, ensuring equipment longevity and process efficiency.

ATMP – Aminotris(methylenephosphonic acid)

General Information

• Chemical Name: ATMP / Amino Trimethylene Phosphonic Acid

• Other Names: Methylenephosphonic Acid, Aminotris

• Chemical Formula: C₃H₁₂NO₉P₃

• CAS Number: 6419-19-8

• Molecular Weight: 299.05 g/mol

• Appearance: White solid (crystalline powder)

• Density: 1.33 g/cm³ (20°C)

• Melting Point: ~200°C (decomposes)

• Solubility: Highly soluble in water (61 g/100 mL)

• Packaging: Drums

Properties

• Excellent chelating ability (binds metal ions effectively).

• Low threshold inhibition – effective at very low concentrations.

• Lattice distortion effect – prevents crystal growth of scale-forming salts.

• High chemical stability – resistant to hydrolysis in water systems.

• Functions as a scale inhibitor and corrosion inhibitor.

Applications

• Water Treatment:

  • Cooling water systems in power plants and refineries.

  • Oilfield water pipelines.

  • Prevents calcium carbonate scaling and corrosion.

• Textile Industry:

  • Chelating agent in dyeing and finishing processes.

• Metal Surface Treatment:

  • Protects against corrosion and scaling.

• Detergents & Cleaning Agents:

  • Improves cleaning efficiency by preventing scale formation.

Phosphonates – Overview

Phosphonates are organophosphorus compounds with strong metal-binding properties, high water solubility, and stability. They are widely used in water treatment, detergents, industrial cleaning, textiles, and coatings.

Key Benefits

• Prevent scale and corrosion in water systems.

• Act as chelating agents for calcium, magnesium, and iron.

• Effective even at low concentrations.

• Stable across wide pH ranges and high temperatures.

Types of Phosphonates

1. ATMP

• Formula: N(CH₂PO₃H₂)₃

• Strong chelation, low threshold inhibition, lattice distortion.

• Applications: water treatment, detergents, textile finishing, metal surface protection.

2. DTMPA

• Formula: (CH₂PO₃H₂)₂NCH₂CH(NHPO₃H₂)₂

• High chelation capacity, effective at low concentrations.

• Works across wide pH ranges, thermally stable.

• Applications: boilers, cooling towers, industrial cleaning, coatings, detergents.

3. EDTMPA

• Formula: (CH₂PO₃H₂)₂NCH₂CH(NHPO₃H₂)₂

• Similar to DTMPA, with strong binding to Ca, Mg, Fe ions.

• Effective in acidic and alkaline environments.

• Applications: water softening, industrial cleaning, coatings, detergents.

4. PBTCA

• Formula: (CH₂PO₃H₂)₂N(CH₂)₂N(CH₂PO₃H₂)₂

• High chelation and stability.

• Strong lattice distortion effect.

• Applications: water treatment, industrial cleaning, coatings, detergents.

Summary

• ATMP is a cost-effective, general-purpose phosphonate with excellent chelating and scale-inhibiting properties.

• Phosphonates (ATMP, DTMPA, EDTMPA, PBTCA) are indispensable in industrial water treatment, detergents, textiles, and coatings due to their ability to prevent scaling, corrosion, and improve cleaning efficiency.

• Their stability across wide operating conditions makes them reliable for long-term industrial use.