Hydroxyphosphonoacetic Acid
HPAA, 2-Hydroxy Phosphonoacetic Acid
- CAS
- 23783-26-8
- EC
- 231-595-7
- Sectors
- Water & Wastewater Treatment, Oil, Gas & Energy, Lubricants & Metalworking
Hydroxyphosphonoacetic Acid (CAS 23783-26-8) is a water-soluble organophosphorus chelating agent supplied as a colorless to pale-yellow liquid, recognized for scale inhibition and for preventing calcium carbonate and calcium sulfate deposition in industrial water treatment, circulating cooling systems and oilfield scale control.
Typical Properties
| Molecular formula | C2H5O6P |
|---|---|
| Molecular weight | 156.03 g/mol |
| Form | Oil |
| Color | Brown to Dark Brown |
| Density | 1.37 (50% aq.) |
| GHS signal word | Danger · Corrosive, Irritant / harmful, Health hazard |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Hydroxyphosphonoacetic Acid
Applications
Widely used in industrial water treatment, circulating cooling systems, and oilfield scale control. It effectively prevents calcium carbonate and calcium sulfate deposition. Also serves as a corrosion inhibitor in metalworking and detergents.
Safety & Risks
Low toxicity but corrosive in concentrated form. Avoid contact with skin and eyes and ensure local exhaust ventilation during handling.
Packaging
Supplied in 30 kg plastic drums or 250 kg IBC tanks. Store sealed in cool, dry, and well-ventilated areas away from strong oxidizers and alkalis.