Bambuterol EP Impurity E CAS 81732-48-1
| CAS No. | 81732-48-1 |
| Molecular Formula | C14H18N2O5 |
| Molecular Weight | 294.30 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Bambuterol EP Impurity E (C14H18N2O5) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 7.0, corresponding to approximately 7 ring(s) or double-bond equivalent(s). With a molecular weight of 294.30 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Bambuterol EP Impurity E (CAS 81732-48-1) is a certified pharmaceutical impurity reference standard with the molecular formula C14H18N2O5 and a molecular weight of 294.30 g/mol.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Bambuterol EP Impurity E 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 | C14H18N2O5 |
| Molecular Weight | 294.30 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| 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 |
| CAS Registry Year (est.) | 1980 |
| Nitrogen Atoms | 2 |
Related Bambuterol Standards
- Bambuterol Impurity 12 (CAS CATO-C4X-274612)
- Bambuterol EP Impurity D (Mixture of Enantiomers) (CAS 112935-93-0)
- Bambuterol EP Impurity C (Mixture of Enantiomers) (CAS 81732-67-4)
- Bambuterol Impurity 5 (CAS CATO-C4X-27465)
- Bambuterol EP Impurity B (CAS 112935-92-9)
- Bambuterol Impurity 3 (CAS CATO-C4X-27463)
- Bambuterol Impurity 4 (CAS CATO-C4X-27464)
- Bambuterol Impurity 2 (CAS CATO-C4X-27462)
Recommended Standards
- Phentolamine Impurity 21 (CAS CATO-C4X-224721)
- Neomycin Impurity 15 (CAS 58096-76-7)
- Glutamic acid Impurity 10 (CAS 67278-32-4)
- Olopatadine Impurity 66 (CAS CATO-C4X-171866)
- Lenvatinib Impurity 15 (CAS 796848-80-1)
- Azithromycin Impurity 44 (CAS 2365312-76-9)
- Istradefylline Impurity 5 (CAS CATO-C4X-10615)
- 2-(3-(Trifluoromethyl)phenyl)azetidine hydrochloride (CAS 1346601-24-8)
- 12-Decarboxylation-12-Methylnatamycin (CAS CATO-C4X-20405)
- 2-Chloro-1,3-bis(bromomethyl)benzene (CAS 25006-87-5)
- 3-(5-Nitrofuran-2-yl)-4H-1,2,4-triazole (CAS 5019-55-6)
- (Hydroxymethyl)triphenylphosphonium (tetrafluoroborate) (CAS 2340-49-0)
- 2-(dimethylamino)pyrimidin-4-ol (CAS 1635-28-5)
- Semaglutide impurity 36 (CAS CATO-C4X-222636)
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