2-Hydroxy Phosphonoacetic Acid (HPAA)
Synonyms: HPAA, HPA, 2-Hydroxy Phosphonoacetic Acid
CAS No.: 23783-26-8
EC No.: 405-710-8
Molecular Weight: 156
Molecular Formula: C2H5O6P
Physical & Chemical properties: HPAA is a pale yellow acidic liquid, easily chelating with di- and trivalent ion such as Fe2-, Mg2-, Ca2-, Ba2-, etc.
2-Hydroxy Phosphonoacetic Acid (HPAA) can be obtained by reaction between glyoxylic acid and phosphorus trichloride: C2H2O3+PCl3+3H2O→C2H5O6P+3HCl
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.
|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.|
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