Product List

Phosphonates Antiscalants, Corrosion Inhibitors and Chelating Agents
Salts of Phosphonates
Polycarboxylic Antiscalant and Dispersant
Biocide and Algicide
Reverse Osmosis Chemicals
Built Scale & Corrosion Inhibitors and Pretreatment Filming Agents
Corrosion Inhibitors & Oxygen Scavenger
Surfactant & Others

2-Hydroxy Phosphonoacetic Acid (HPAA)

CAS No. 23783-26-8 EINECS No. 405-710-8
Molecular Formula C2H5O6P Molecular Weight 156
Structural Formula

HPAA Structural Formula

Product Features

HPAA is a powerful and well-known ferrous metal corrosion inhibitor for all-organic cooling water formulations. Because HPAA can improve zinc solubility. So HPAA can be used either on its own or as part of an all organic or low level zinc program. HPAA gives significantly better performance than commodity phosphonates such as HEDP. Its corrosion inhibition ability is 5-8 times better than other of HEDP and EDTMP. When built with low molecular polymers, its corrosion inhibition effect is even better. Moreover, HPAA is also a cost effective alternate to sodium molybdate. It can be more easily tested in the field.With HPAA, you can restore the profitability of water treatment programs by increasing formulation profitability. HPAA is a environmentally friendly products. HPAA provides higher biodegradability (93%) and much better environmental profile versus other available programs.

Technical Specification

Parameter Standard
Appearance Dark umber liquid
Active content, % 50.0 min
Total phosphonic acid (as PO43-), % 25.0 min
Phosphoric acid (as PO43-), % 1.50 max
Density (20℃), g/cm3 1.30 min
pH (1% water solution) 1.0-3.0

Applications & Usage

HPAA is mainly used as cathode corrosion inhibitor in well-controlled halogenated cooling system such as steel & iron, petrochemcal, power plant and medical industries. When built with zinc salt, the effect is even better.

Package & Storage

HPAA Liquid
25L Drum 200L Drum 1000L IBC ISO Tank
25kg Bag 200L Drum packaging 1000L IBC packaging ISO Tank Packaging
Storage for 10 months in shady room and dry place.

Hazard & Safety Precaution

Hazard Information Safety Precaution

Corrosive, Class 8, UN 3265 Corrosive, Class 8, UN 3265

Wear protective gloves Wear protective goggles Wear protective clothing

Once contacted with eye and skin, flush with plenty of clean water.

Alternative Name / Synonyms

  1. HPAA;
  2. HPA;
  3. 2-Hydroxyphosphonocarboxylic Acid;
  4. Hydroxyphosphono-acetic acid;