Amino Trimethylene Phosphonic Acid
(ATMP)
CAS No. 6419-19-8
Molecular Formula: N(CH2PO3H2)3
Molecular weight: 299.05
Synonyms:Nitrilo trimethane phosphonic acid, Dequest 2000
Structural Formula:
Properties:
ATMP has excellent chelation, low threshold inhibition and lattice distortion ability. It can prevent
scale formation, calcium carbonate in particular, in water system. It has good chemical stability
and is hard to be hydrolyzed in water system. At high concentration, it has good corrosion
inhibition.
ATMP is used in industrial circulating cool water system and oilfield water pipeline in fields of
thermal power plant and oil refinery plant. It can decrease scale formation and inhibit corrosion of
metal equipment and pipeline. It can be used as chelating agent in woven and dyeing industries
and as metal surface treatment agent.
Solid ATMP is crystal powder, soluble in water, easily deliquescence, suitable for usage in winter
and freezing districts. Due to its high purity, it can be used in woven dyeing industries and as metal
surface treatment agent.
Specification:
Items Index
Standard Standard
Solid
Appearance Clear, Colorless to pale yellow aqueous solution White crystal powder
Active acid % 50.0 min 95.0 min
Chloride (as Cl- )% 1.0 max 1.0 min
pH value (1% solution) 2.0 max 2.0 max
Fe,mg/L 10.0 max 20.0 max
Density (20℃)g/cm3 1.31-1.35 -
Color APHA (Hazen) 30.0 max -
Ca Sequestration 450.0 min
Usage:
ATMP is usually used together with organophosphoric acid, polycarboxylic acid and salt to buid all
organic alkaline water treatment agent. It 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 inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients.
Storage for ten months in room shady and dry place.
Safety Protection:
Acidity, Avoid contact with eye and skin, once contacted, flush with water.
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