HEDP
Etidronic Acid, Etidronate
- CAS
- 7414-83-7
- EC
- 230-458-3
- Sectors
- Water & Wastewater Treatment, Oil, Gas & Energy, Lubricants & Metalworking
HEDP (CAS 7414-83-7), also known as etidronic acid, is an organophosphonate chelating agent supplied as a white crystalline solid, with strong scale-inhibition properties that make it useful in industrial water treatment, detergents, oilfield scale control, and metal surface treatment. It appears as a colorless to pale-yellow liquid or crystalline powder depending on formulation.
Typical Properties
| Molecular formula | C2H8O7P2.2Na |
|---|---|
| Molecular weight | 249.99 g/mol |
| Appearance | White Crystalline Solid |
| Form | solid |
| Color | white |
| Melting point | >300 °C |
| Water solubility | Soluble in water (26 mg/ml). |
| GHS signal word | Warning · Irritant / harmful |
| HS code | 29319090 |
| 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.
HEDP
Applications
Used in industrial water treatment, detergents, and oilfield scale control. Also applied in metal surface treatment and cleaning formulations to prevent corrosion and scaling.
Safety & Risks
Low acute toxicity but corrosive in concentrated form. Use acid-resistant PPE during handling.
Packaging
Supplied in 30 kg plastic drums or 250 kg IBC tanks. Store sealed, cool, and away from alkalis.