Hydroxyethylidene diphosphonic acid (HEDP) is used as corrosion and scale inhibition in circulating cooling water systems, low-pressure boilers and in oil field applications such as electric power, refineries, chemical industry, fertilizer and metallurgy etc.
Water Treatment
Oil and Gas Industry
Textile Industry
Chemical Manufacturing
Industrial Cleaning
Metal Surface Treatment
Construction Industry
Agriculture
| Items | Index | |
| Active content (HEDP) | ≥ 60 % | ≥ 90.0 % |
| Active content (HEDP·H2O) | – | ≥ 98.0 % |
| Phosphorous acid (as PO33-) | ≤ 1.0 % | ≤ 0.8 % |
| Phosphoric acid (asPO43-) | ≤ 0.6 % | ≤ 0.5 % |
| Chloride (as Cl–) ppm | ≤ 100.0 | ≤ 100.0 |
| pH (1% solution) | ≤ 2.0 | ≤ 2.0 |
| Density (20℃) g/cm3 | 1.43-1.47 | – |
| Fe (mg/L) | ≤ 10.0 | ≤ 5.0 |
| Color APHA (Hazen) | ≤ 40 | – |
| Ca sequestration (mg CaCO3/g) | ≥ 500.0 | |
