Lonwin Industry Group Limited. All Rights Reserved Copyright@Lonwinchem.com
E-email: sales@lonwinchem.com
Aminotris(methanephosphonicacid) (ATMP)


Synonyms: Aminotris(methanephosphonic acid); ATMP; Nitrilotrimethanephosphonic acid

Molecular Formula:C3H12NO9P3
Molecular Weight: 299.05
CAS Number: 6419-19-8
EINECS Number: 2291465


Appearance: colorless to pale yellow clear liquid

Odor: slightly aromatic
Density: 1.28-1.38 g/ml at 20 °C
Solubility in water:miscible
Stability: stable under ordinary conditions



Test Items

Colorless to pale yellow clear liquid
Active acid
48.0 – 52.0%
pH (1% solution) @ 25 ℃
2.0 max
Density @20 ℃
1.28 – 1.38g/cm3 
Chloride (as Cl)
1% max
Iron (as Fe)
20ppm max
H3PO3 (as PO3)
4.5% max


Storage and Packing

Packing: 250kgs net in PE drum, 1250kgs net in IBC or Isotank



ATMP is widely used as a sequestering agent and calcium carbonate scale inhibitor for applications in industrial water treatment, industrial cleaning, oil production and textile bleaching.

Safety Infromation

UN 3265 8/PG 3