Amino Tris (Methylene Phosphonic Acid)


CAS No.: 6419-19-8
Other Name: ATMPA
Molecular Formula: N(CH2PO3H2)3
Molecular Weight: 299.05

ATMP has excellent chelation, low threshold inhibition and lattice distortion ability. It can prevent the scale formation, particularly the formation of calcium carbonate scale in water. ATMP has good chemical stability and is hard to be hydrolyzed in water. At high concentration, it has good corrosion inhibition.

ATMP is used in the circulating cooling water system and the oilfield refill water system of thermal power plant and oil refinery plant. ATMP can decrease the scale formation and inhibit corrosion of metal equipments and pipelines. ATMP can be used as chelating agent in textile and dyeing industries and as metal surface treatment agent.

The solid state of ATMP is crystal powder. It is soluble in water, deliquescent, suitable for using in winter and freezing districts. Because of its high purity, it can be used in textile & dyeing industries and used as metal surface treatment agent.

Items Index
Standard Solid
Appearance Colorless or pale yellow transparent aqueous solution White crystal powder
Active acid % 48.0-52.0 95.0min
Chloride ( Cl -)% 2.0max 1.0 min
pH value (1% solution) 2.0 max 2.0 max
Fe, mg/L 20.0max 20.0max
Density (20 ℃ )g/cm3 1.31-1.35 -
Colour APHA (Hazen) 30.0max -
Phosphoric acid( PO4 3- )% 0.8 0.8
Phosphorous acid( PO3 3- )% 3.0
Ca Sequestration (mg CaCO3/g) 400.0 min 800

ATMP is usually used together with organophosphoric acid, polycarboxylic acid and salt to build all organic alkaline water treatment agent. ATMP can be used in many different circulating cooling water systems. The dosage of 1-20mg/L is recommended. As a corrosion inhibitor, the dosage of 20-60mg/L is preferred.

Package and Storage:
ATMP liquid: 200L plastic drum, IBC (1000L), or as customers’ requirements.
ATMP solid: 25kg inner liner polyethylene (PE) bag, outer plastic woven bag, or decided by clients.
Storage for ten months in room and in shady and dry places.

Safety Protection:
Acidic. Avoid contact with eyes, skin or clothing. In case of contact with eyes or skin, please rinse immediately with plenty of water.

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Shandong Xintai Water Treatment Technology Co., Ltd.

Add: Zhongtai Industry Park, Shizhong District, Zaozhuang City, Shandong Province, China
Tel.: +86-632-3461088
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