Ipratropium Impurity 26 CAS CATO-C4X-166526
| CAS No. | CATO-C4X-166526 |
| Molecular Formula | C19H25NO2 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Ipratropium Impurity 26 (CAS CATO-C4X-166526) is a certified pharmaceutical impurity reference standard with the molecular formula C19H25NO2CH2O2 and a molecular weight of 345.44 g/mol.
Structurally, Ipratropium Impurity 26 (C19H25NO2CH2O2) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 8.0, corresponding to approximately 8 ring(s) or double-bond equivalent(s). With a molecular weight of 345.44 g/mol, it falls into the moderately-high-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C19H25NO2 CH2O2 |
| Molecular Weight | 345.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Ipratropium Standards
- Ipratropium Impurity 24 (Mixture of Isomers) (CAS 17812-46-3)
- Ipratropium Impurity 17 (CAS 17838-69-6)
- (S)-Ipratropium Bromide EP Impurity E Formate (CAS 183626-76-8)
- Ipratropium Bromide EP Impurity E (CAS 22235-81-0)
- Ipratropium Bromide (CAS 22254-24-6)
- Ipratropium Impurity 30 (CAS 259092-15-4)
- Ipratropium Bromide Impurity 33 (CAS 2784-21-6)
- Ipratropium Impurity 31 (CAS 3423-25-4)
Recommended Standards
- Sepiapterin Impurity 6 (CAS 2387-48-6)
- Aztreonam impurity 94 (CAS CATO-C4X-152294)
- Brivaracetam Impurity 170 (CAS CATO-C4X-2007170)
- Methyl 3-(2-chloro-6-fluorophenyl)-2-oxopropanoate (CAS 1181454-69-2)
- diethyl 2-[(2-fluoroanilino)methylene]malonate (CAS 63010-68-4)
- 1-(1,3-Oxathiolan-2-yl)propane-2-thiol (CAS 95792-16-8)
- 2,6-Dihydrazino-4-methylpyrimidine (CAS 1980-55-8)
- 2,4,5-Trichlorobenzonitrile (CAS 6575-04-8)
- Hydroxychloroquine Impurity 68 (CAS 23443-05-2)
- GnRH Associated Peptide (GAP) (1-13), human (CAS 100111-07-7)
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