Chemical Product Library / Reference
1-Hydroxyethylidene-1,1-diphosphonic acid
Chemical identity, technical indicators, performance and application reference. Confirm specifications and regulatory suitability against supplier documentation.
Chemical identity
| English name | 1-Hydroxyethylidene-1,1-diphosphonic acid |
|---|---|
| English synonyms | HEDP;Etidronic acid;Hydroxyethylidene diphosphonic acid |
| Chinese name | 1-羟基乙叉-1,1-二膦酸 |
| Chinese synonyms | HEDP;羟基乙叉二膦酸;依替膦酸 |
| Chemical category | Scale Inhibitors |
| CAS No. | 2809-21-4 |
| EINECS No. | 220-552-8 |
| Molecular formula | C2H8O7P2 |
| Molecular weight | 206.03 |
PubChem structure images are reference depictions, not proof of composition, purity, grade, or regulatory status. Mixtures and polymers may not have a single representative structure.
Technical indicators
Active content ≥60.0% (aqueous) or ≥98.0% (solid); phosphorous acid ≤2.0%; chloride ≤0.01%; pH (1% aqueous solution) ≤2.0
Performance characteristics
Colorless to pale yellow liquid or white crystalline powder, excellent scale inhibition and chelating properties
Application scenarios
Industrial cooling water treatment, boiler water scale inhibitor, oilfield scale inhibitor, chelating agent