2-Hydroxy Phosphonoacetic Acid

• CAS Number: 23783-26-8
• EINECS Number: 405-710-8
• Molecular Formula: C₂H₅O₆P
• Molecular Weight: 156
• Structural Formula:

2-Hydroxy Phosphonoacetic Acid is a powerful ferrous metal corrosion inhibitor suitable for all-organic cooling water formulations. It can improve the solubility of zinc, so it can be used either on its own or as part of an all-organic or low-level zinc program. The corrosion inhibition ability of 2-Hydroxy Phosphonoacetic Acid is 5-8 times better than that of other commodity phosphonates such as HEDP and EDTMP. When combined with low molecular weight polymers, its corrosion inhibition effect is even better. Moreover, 2-Hydroxy Phosphonoacetic Acid(HPAA) is also a cost-effective alternative to sodium molybdate and can be more easily tested in the field. It is an environmentally friendly product with higher biodegradability (93%) and a much better environmental profile compared to other available programs.

Technical specifications are as follows:

• Appearance: Dark brown liquid
• Active content, %: 50.0 min
• Total phosphonic acid (as PO₄^3-), %: 25.0 min
• Phosphoric acid(as PO₄^3-), %: 1.50 max
• Density (20℃), g/cm³ 1.30 min
• pH (1% water solution): 1.0-3.0

2-Hydroxy Phosphonoacetic Acid is mainly used as a cathodic corrosion inhibitor in well-controlled halogenated cooling systas such as steel & iron, petrochaical, power plant, and medical industries. The effect is even better when built with zinc salts.

Packaging and storage:

Hazard & Safety Precaution:

Alternative Name / Synonyms