Glycopyrronium Bromide Impurity 21 CAS CATO-C4X-181721
| CAS No. | CATO-C4X-181721 |
| Molecular Formula | C14H16O3 |
| Molecular Weight | 232.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Glycopyrronium Bromide Impurity 21 (CAS CATO-C4X-181721) is a certified pharmaceutical impurity reference standard with the molecular formula C14H16O3 and a molecular weight of 232.28 g/mol.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, Glycopyrronium Bromide Impurity 21 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 232.28 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
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 | C14H16O3 |
| Molecular Weight | 232.28 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Glycopyrronium Standards
- Glycopyrronium Bromide EP Impurity L (CAS 64471-47-2)
- Glycopyrronium Bromide EP Impurity L (CAS 19833-96-6)
- Glycopyrronium Bromide EP Impurity J (CAS 427-49-6)
- Glycopyrronium Bromide impurity 16 (CAS 16098-80-9)
- Glycopyrronium Bromide EP Impurity O (CAS 618-88-2)
- Glycopyrronium Bromide EP Impurity K (CAS 3900-93-4)
- Glycopyrronium Bromide impurity 17 (CAS CATO-C4X-181717)
- Glycopyrronium Bromide impurity 12 (CAS 22065-57-2)
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