Hydroxy phosphonoacetic acid (HPAA) is chemically stable. It is hard to be hydrolyzed and to be destroyed by acid or alkali. So HPAA water treatment chemical is safe in use.  It is also no toxicity and no pollution. Hydroxy phosphonoacetic acid 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.

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Structure Formula:

hydroxy phosphonoacetic acid structure formula


Item Index
Appearance Dark umber transparent liquid
Solid content, % 50.0 Min.
pH Value (1% solution) 3.0 Max.
Density (20℃), g/cm3 1.30 Min.


Hydroxy phosphonoacetic acid is mainly used as a cathode corrosion inhibitor in oilfield refill water systems in fields such as steel & iron, petrochemical, power plant, and medical industries. When built with zinc salt, the effect is even better.

Packing and Storage:

200L plastic drum,IBC(1000L),customers’ requirement. Storage for one year in shady room and dry place.


HPA, 2-Hydroxyphosphonocarboxylic Acid, Belcor 575.


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