Tungsten zirconium oxide, 99.7% (metals basis excluding Hf), Hf CAS 16853-74-0
| CAS No. | 16853-74-0 |
| Molecular Formula | 2*O4W |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Tungsten zirconium oxide, 99.7% (metals basis excluding Hf), Hf (O4WZr) contains an inorganic composition. It is notably hygroscopic; these physicochemical properties determine the optimal preparation and storage of its standard solutions.
Tungsten zirconium oxide, 99.7% (metals basis excluding Hf), Hf (CAS 16853-74-0) is a high-purity analytical reference standard with the molecular formula O4WZr and a molecular weight of 339.06 g/mol.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | 2*O4W Zr |
| Molecular Weight | 339.06 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.) | 1961 |
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