HEDP
The workhorse phosphonate for scale and corrosion control
Product Description
A high-performance organophosphonic acid that delivers scale inhibition and corrosion protection from a single molecule. It works by threshold effect — the molecule adsorbs onto the surface of scale microcrystals and stops them growing — while a thin protective film forms on metal surfaces to slow corrosion. Stable at high temperature and under chlorine, effective at very low dosage, and synergistic with dispersant polymers, zinc salts and other phosphonates.
- Scale inhibition at low dosage — threshold effect keeps CaCO₃ and CaSO₄ in solution
- Stable under chlorine, bleach and elevated temperature
- Chelates calcium, magnesium, iron and zinc ions
- Synergistic with dispersant polymers, zinc salts and other phosphonates
Specifications
- Appearance
- White crystalline powder / colourless liquid
- Active content
- ≥ 98 % solid · 60 % liquid (as acid)
- pH (1 % solution)
- ≤ 2
- Density (60 % liquid, 20 °C)
- 1.40 – 1.45 g/cm³
- Solubility
- Water, methanol and ethanol
- Molecular weight
- 206.03 g/mol
- CAS number
- 2809-21-4
- Packaging
- 25 kg bags · drums · IBC · bulk
The full technical data sheet covers more than 20 parameters — including phosphite, iron, chloride and heavy-metal content — together with handling, storage and safety guidance.
Applications
- Cooling water and boiler systems — scale and corrosion inhibition
- Reverse-osmosis and membrane pretreatment programmes
- Industrial and CIP cleaning formulations (descalers)
- Oilfield scale control and waterflood systems
- Detergent and cleaner formulations, peroxide-stable
- Textile dyeing, bleaching and peroxide stabilisation
Need a quotation or the full technical data?
Tell us the grade, quantity and destination port — we reply within one business day with pricing, TDS and MSDS.