Hexametaphosphoric acid CAS 18694-07-0
| CAS No. | 18694-07-0 |
| Molecular Formula | H6O18P6 |
| Molecular Weight | 479.88 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Hexametaphosphoric acid (CAS 18694-07-0) is a high-purity analytical reference standard with the molecular formula H6O18P6 and a molecular weight of 479.88 g/mol.
Owing to a phosphate ester group, Hexametaphosphoric acid is typically white to off-white crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 479.88 g/mol — guide the selection of appropriate sample preparation and analytical techniques.
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 | H6O18P6 |
| Molecular Weight | 479.88 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.) | 1962 |
Recommended Standards
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Why CATO?
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