| Abbreviation: | HEDP 50% (NSF certified) |
| Product code: | NST1101 |
| Supplier: | NASTA Trading GmbH |
| Molecular Formula: | C2H8O7P2 |
| Commercial Form: | Aqueous Solution |
| MolecularWeight: | 294 |
| Chemical Name: | sodium salt of (1-hydroxy ethylidene) diphosphonic acid |
| CAS Number: | 2809-21-4 |
| EC Number: | 220-552-8 |
| Recommended Uses: | Cooling water treatment, boiler treatment, I & I Cleaners, swimming pool stain prevention, personal care products, metal ion control |
Characteristics |
Limits |
| Appearance | Clear colourless to pale tan liquid, free from foreign matter |
| Active Acid % | 50.0 minimum |
| Phosphorous acid as PO33-(%) | 3.0 maximum |
| Phosphorous acid as PO43-(%) | 1.0 maximum |
| Chloride as Cl-(%) | 0.5 maximum |
| Sequestrant value (CaCO3)mg/g | 450 minimum |
| pH (1% solution) | 2.0 maximum |
| Density at 20°C, g/cm3 | 1.340 minimum |
| Iron content (Fe ppm) | 35.0 maximum |
| Colour (APHA) | 80 maximum |