2-Hydroxy Phosphonoacetic Acid (HPAA)

CAS No. 23783-26-8

Molecular Formula:C2H5O6P Molecular weight: 156

Structural Formula:



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


AppearanceDark umber liquid
Solid content, %50.0min
Total phosphonic acid (as PO43-), %25.0 min
Phosphoric acid (as PO43-), %1.50 max
Density (20℃), g/cm31.30 min
pH (1% water solution)1.0-3.0


HPAAis mainly used as cathodecorrosion inhibitorin oilfield refill water system in fields such as steel & iron, petrochemcal, power plant and medical industries. When built with zinc salt, the effect is even better.

Package and Storage:

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

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