HEDP Scale Inhibitor (Hydroxyethylidene Diphosphonic Acid)
CAS Number: 2809-21-4
HEDP is a highly effective phosphonate scale and corrosion inhibitor widely used in oilfield water treatment, cooling water systems, and injection water management. It demonstrates excellent inhibition against calcium carbonate, calcium sulfate, and barium sulfate scales at low dosage levels (2–20 ppm). HEDP is stable under high-temperature conditions up to 200°C and exhibits strong chelation of metal ions.
Technical Specifications
| appearance | Colorless to light yellow liquid |
| pH (1% solution) | ≤2.0 |
| active content (%) | ≥60 |
| density (g/cm³, 20°C) | ≥1.40 |
| chloride (as Cl⁻, ppm) | ≤50 |
Applications
- Oilfield injection water scale inhibition
- Cooling water systems corrosion and scale control
- Boiler water treatment
- Oil and gas production facilities water management
- Desalination pre-treatment
Key Features
- Excellent scale inhibition for carbonate, sulfate, and barium sulfate scales
- Effective corrosion inhibitor for iron and zinc metals
- Thermally stable up to 200°C in oilfield environments
- Low effective dosage reduces operational costs
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