Phosphotungstic Acid CAS 12067-99-1
| CAS No. | 12067-99-1 |
| Molecular Formula | 12*O3W |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Phosphotungstic Acid (O3WH3O4PH2O) is characterized by a phosphate ester group. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development.
Phosphotungstic Acid (CAS 12067-99-1) is a high-purity analytical reference standard with the molecular formula O3WH3O4PH2O and a molecular weight of 347.85 g/mol.
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), Phosphotungstic Acid 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 | 12*O3W H3O4P 44*H2O |
| Molecular Weight | 347.85 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.) | 1960 |
Related Phosphotungstic Standards
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