Product show
2-Hydroxy Phosphonoacetic Acid (HPAA)
Identification
Synonyms: HPAA, HPA, 2-Hydroxy Phosphonoacetic Acid
CAS No.: 23783-26-8
EC No.: 405-710-8
Molecular Weight: 156
Molecular Formula: C2H5O6P
Structural Formula: 
Physical & Chemical properties: HPAA is a pale yellow acidic liquid, easily chelating with di- and trivalent ion such as Fe2-, Mg2-, Ca2-, Ba2-, etc.
Preparation
2-Hydroxy Phosphonoacetic Acid (HPAA) can be obtained by reaction between glyoxylic acid and phosphorus trichloride: C2H2O3+PCl3+3H2O→C2H5O6P+3HCl
Application
2-Hydroxy Phosphonoacetic Acid (HPAA) is primarily used as scale inhibitor in water treatment, pipeline. It a) has the best corrosion inhibiting ability among phosphonates, suitable for high-corrosion water; b) is compatible with zinc salt; c) has good heat-stability, high temperature resistance is 200 deg.C d) contents lower phosphorus, lower impact on environment.
Specification*
| Items | Specification |
|---|---|
| Appearance | Dark brown liquid |
| Solid Content | 50% min. |
| Phosphorous Acid (as PO3) | 3.0% max. |
| pH Value (1% aqueous) | 2.0 max. |
| Color, APHA | 80 max. |
| Density( 20°C), g/cm3 | 1.30 min. |
Standard Packaging
250kgs net/200L plastic drum; 1250kgs net/IBC; ISO Tank
Store in plastic, glass-lined container. Expiry: 12 month
Risks and Safety Information
2-Hydroxy Phosphonoacetic Acid (HPAA) is regulated by UN as hazardous substance.
Danger! Corrosive Liquid, Organic, N.O.S.
UN 3265, Class 8, PG III
For more information, please see MSDS
