Water Treatment Chemicals, Phosphonates, Polymers, Biocides

Organophosphoric Antiscale and Corrosion Inhibitors, Chelant

2-Hydroxy Phosphonoacetic Acid(HPAA)

CAS No. 23783-26-8

Molecular Formula: C2H5O6P

Molecular weight: 156

Structural Formula:

2-Hydroxyphosphonocarboxylic Acid (HPAA) Structural Formula


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.


items index
Appearance Dark umber transparent liquid
Solid content % 50.0 min
pH(1% solution) 3.0max
Density (20℃)g/cm3 1.30 min


HPAA is mainly used as cathode corrosion inhibitor in 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.


HPAA; HPA; 2-Hydroxyphosphonocarboxylic Acid;Hydroxyphosphono-acetic acid; 2-HYDROXY PHOSPHONOACETIC ACID


HexaMethyleneDiamineTetra (MethylenePhosphonic Acid) HMDTMPA
Ethylene Diamine Tetra Methylene Phosphonic Acid, EDTMP
Polyhydric alcohol phosphate ester (PAPE)

Shandong IRO Water Treatment Co., Ltd.

Office Address: 2802, 1st Building, No.19 Zhangzhou 2nd Rd, Qingdao, China
Factory Address: Qicun Town, Shizhong, Zaozhuang, Shandong, China
Tel: +86-532-85027466 Fax: +86 532 85028486
Email: info@irowater.com

Our websites use cookies to ensure you get the best possible experience. By continuing, you agree to our use of cookies on this website.Learn more