Organic phosphonate liquid series corrosion inhibition

2-Hydroxyphosphonocarboxylic Acid(HPAA)


CAS NO. 23783-26-8

Molecular Formula: C2H5O6P                  Molecular weight:156

Properties and Usage:

HPAA is chemically stable, hard to be hydrolyzed, hard to be destroyed by acid or alkali, safety in use, no toxicity, no pollution. HPAA can improve zinc solubility. Its corrosion inhibition ability is 5-8 times better than that of HEDP and EDTMP. When built with low molecular polymers, its corrosion inhibition effect is even better.





Dark umber transparent viscous liquid

Solid content %

45 - 50

Phosphorous acid(as PO33-)%


pH(1% solution)

1 - 3

Density (20)g/cm3


Application range&using method

HPAA is mainly used as metal cathode corrosion inhibitor. It can be widely used in the circulating cool water system, play as a corrosion inhibitor in the field of steel & iron, petrochemcal, power plant and medicine. It is suitable as a corrosion inhibitor for the low-hardness and corrosion water of the south of China. When built with zinc salt, the effect is even better.

Package and Storage:

Normally In 30kg net Plastic Drum. Storage for ten month  in room shady and dry place.

Safety Protection:

Acidity, Avoid contact with eye and skin, once contacted, flush with water.