| CAS No. | 304671-71-4 |
| Molecular Formula | O7P2 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Copper(II) diphosphate hydrate (CAS 304671-71-4), molecular formula O7P2CuH2O and molecular weight 255.50 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a phosphate ester group, Copper(II) diphosphate hydrate is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 255.50 g/mol — guide the selection of appropriate sample preparation and analytical techniques.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
As a certified reference material (CRM), Copper(II) diphosphate hydrate meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
| Molecular Formula | O7P2 2*Cu H2O |
| Molecular Weight | 255.50 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Freely soluble in water |
| Stability | Hygroscopic; reseal immediately after opening |
| CAS Registry Year (est.) | 2025 |