Amino Trimethylene Phosphonic Acid, Nitrilotrismethylenephosphonic acid, NTMP,  ATMP, ATMPA, 6419-19-8

Amino Trimethylene Phosphonic Acid, Nitrilotrismethylenephosphonic acid, NTMP,  ATMP, ATMPA, 6419-19-8

AMINO TRIMETHYLENE PHOSPHONIC ACID (ATMP)

CAS 6419-19-8 | C₃H₁₂NO₉P₃

SECTION 1: PRODUCT IDENTITY AND DEFINITION

Description: ATMP (Amino Trimethylene Phosphonic Acid) is one of the most widely used phosphonates. It belongs to the aminophosphonic acid family and contains three phosphonic acid groups. It exhibits excellent chelation capacity, low threshold inhibition, and high chemical stability. It has high water solubility and is stable across a wide pH range. It is widely used as a scale and corrosion inhibitor in water treatment systems, detergent formulations, textile industry, and metal surface treatment. It shows synergistic effects when used with zinc and phosphates.

SECTION 2: SYNONYMS AND OTHER NAMES

SECTION 3: CHEMICAL STRUCTURE AND PROPERTIES

Structural Formula:

         CH₂PO₃H₂
            |
    N - CH₂PO₃H₂
            |
         CH₂PO₃H₂

    Nitrilotris(methylenephosphonic acid) (ATMP)

Key Characteristics:

• Three phosphonic acid groups: Excellent metal ion binding and chelation

• One amine group: Additional coordination site

• Nitrilo backbone: Provides structural stability

• High chelation capacity: Forms multiple-ring chelates

• Low threshold inhibition: Effective at very low concentrations

• High chemical stability: Stable in water and at high temperatures; resistant to hydrolysis

• Lattice distortion: Inhibits crystal growth

SECTION 4: PHYSICAL AND CHEMICAL PROPERTIES

SECTION 5: CHELATION AND INHIBITION MECHANISM

Description: ATMP acts by forming stable, water-soluble complexes with metal ions. The chelation process involves the coordination of the metal ion by the three phosphonate groups and one amine nitrogen atom of the ATMP molecule. This encapsulating structure effectively "traps" the metal ion, preventing it from participating in precipitation and scale formation. ATMP exhibits a "threshold effect" which prevents scale formation at very low concentrations (1-10 ppm). Through lattice distortion, it disrupts crystal growth and prevents scale formation.

SECTION 6: COMPARISON WITH OTHER PHOSPHONATES

SECTION 7: APPLICATIONS

SECTION 8: ADVANTAGES AND BENEFITS

SECTION 9: REGULATORY STATUS

SECTION 10: SAFETY AND TOXICOLOGICAL PROFILE

GHS Classification (Acidic Form):

• R34 – Causes burns

• R35 – Causes severe burns

Safety Recommendations:

• S26: In case of eye contact, rinse immediately with plenty of water and seek medical advice

• S36/37/39: Wear suitable protective clothing, gloves, and eye/face protection

• S45: In case of accident, seek medical advice

• S27: Remove all contaminated clothing immediately

• S23: Do not breathe vapor

• PPE: Chemical resistant gloves, safety goggles, protective clothing

SECTION 11: STORAGE AND SHELF LIFE

SECTION 12: QUALITY CERTIFICATES AND STANDARDS

SECTION 13: DISCLAIMER AND LEGAL NOTICE

DISCLAIMER (LEGAL NOTICE): This Technical Data Sheet (TDS) is for informational purposes only and does not constitute a binding specification. The values stated herein are based on typical laboratory results. The user is solely responsible for determining the suitability of the product for the intended application and for ensuring compliance with all local regulations. A current Safety Data Sheet (SDS) and Certificate of Analysis (COA) should be requested prior to use. Acidic form may cause skin and eye irritation; appropriate protective measures should be taken. This document does not grant any license or patent rights for use of the product.