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 to use.  It also has 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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Molecular Formula:


Molecular Weight:


Structure Formula:

hydroxy phosphonoacetic acid structure formula


AppearanceDark umber transparent liquid
Solid content, %50.0 Min.
pH Value (1% solution)3.0 Max.
Density (20℃), g/cm31.30 Min.


Hydroxy phosphonoacetic acid is mainly used as a cathode corrosion inhibitor in oilfield refill water systems in 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 a shady room and dry place.

200l plastic drum 1000l IBC


HPA, 2-Hydroxyphosphonocarboxylic Acid, Belcor 575.


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