(1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt (3794-83-0)
Basic Information
1. Chemical Name: Tetrasodium Hydroxyethylidene Diphosphonate
2. Chinese Aliases: Tetrasodium Hydroxyethylidene Diphosphonate Salt; HEDP Tetrasodium; Hydroxyethylidene Diphosphonate; Tetrasodium Hydroxyethylenediphosphonate
3. English Name: Tetrasodium Hydroxyethylidene Diphosphonate; HEDPS; HEDP ·Na₄; (1-Hydroxyethylidene)bis-phosphonic acid tetrasodium salt
4. Molecular Formula: C₂H₄Na₄O₇P₂
5. Molecular Weight: 230.02
6. CAS Number: 3794-83-0
7. EINECS Number: 223-267-7
Technical Specifications
Item | Appearance | Active Content (as HEDP) % | Active Content (as HEDP ·Na₄) % | Total Phosphorus (as PO₄³ˉ) % | Iron (as Fe) µg/g | Density (20℃) g/cm³ | pH (1% aqueous solution) | Loss on Drying %
---|---|---|---|---|---|---|---|---
Solution | Colorless to slightly yellow transparent liquid | 20.3-21.7 | 29.0-31.0 | 18.4-20.4 | ≤20 | 1.26-1.36 | 10.0-12.0 | /
Powder | White powdery solid | ≥60.0 | ≥85.6 | ≥52.0 | 35 | / | 11.0-12.0 | ≤10
Granules | White granular solid | 57-63 | 81-90 | / | 35 | / | 11.0-12.0 | ≤10
(The above values are reference values; the actual values are subject to the factory inspection report.)
Packaging Specifications
- 25kg polyethylene-lined woven bag
- 1000kg bulk bag (suitable for large shipments)
- Small sample bags or customized packaging available upon customer request