Hydroxyethylidene Diphosphonic Acid (HEDP) 60% Solution
Hydroxyethylidene Diphosphonic Acid (HEDP, Etidronic Acid) is a widely used organophosphonate scale and corrosion inhibitor with excellent chelating ability for Ca, Mg and Fe ions in cooling water, boiler water and oilfield systems. Richest Group supplies HEDP 60% solution with consistent quality, batch COA and complete export documentation.
Quick Facts
- Purity: Active acid ≥ 60%
- Standard: HG/T 3537-2010
- Packaging: 250 kg net plastic drums or 1250 kg IBC totes
- DG cargo: UN 3265 / Class 8 / PG III
- Documents: COA with each batch; MSDS & SPEC on request
Specifications
| Item | Specification |
|---|---|
| Appearance | Clear colorless to pale tan liquid, free from foreign matter |
| Odor | Slight to none |
| Active acid, % | ≥ 60.0 |
| Phosphorous acid (as PO3 3-), % | ≤ 2.0 |
| Phosphoric acid (as PO4 3-), % | ≤ 0.8 |
| Chloride (as Cl), ppm | ≤ 100 |
| Sequestrant value (as CaCO3, pH 11-12), mg/g | ≥ 500 |
| pH (1% solution, 20 °C) | ≤ 2.0 |
| Density (20 °C), g/cm³ | ≥ 1.440 |
| Iron content (Fe), ppm | ≤ 35.0 |
| Colour (Hazen) | ≤ 80 |
Main Applications
- Scale and corrosion inhibitor in circulating cooling water and boiler systems
- Oilfield water injection and scale squeeze treatment
- Chelating agent and peroxide stabilizer in textile bleaching and dyeing
- Metal surface treatment, electroplating and industrial cleaning
Packaging & Shipping
250 kg net plastic drums or 1250 kg IBC totes. Dangerous goods: UN 3265, Class 8, PG III. Store in a cool, shaded place away from oxidizing agents and strong bases; shelf life 12 months. COA is provided with each batch; MSDS and SPEC are available upon request.