Sodium Phosphotungstate CAS 51312-42-6
| CAS No. | 51312-42-6 |
| Molecular Formula | W |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Sodium Phosphotungstate (CAS 51312-42-6), molecular formula WO4PNaHOO and molecular weight 334.81 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a phosphate ester group, Sodium Phosphotungstate is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 334.81 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), Sodium Phosphotungstate 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.
Physical & Chemical Properties
| Molecular Formula | W O4P Na HO O |
| Molecular Weight | 334.81 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.) | 1971 |
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