Ipratropium Impurity 11 CAS 5894-79-1
| CAS No. | 5894-79-1 |
| Molecular Formula | C10H10O3 |
| Molecular Weight | 178.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 178.18 g/mol gives Ipratropium Impurity 11 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ipratropium Impurity 11 (CAS 5894-79-1) is a certified pharmaceutical impurity reference standard with the molecular formula C10H10O3 and a molecular weight of 178.18 g/mol.
Based on its molecular formula C10H10O3, Ipratropium Impurity 11 contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 178.18 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Ipratropium Impurity 11 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 | C10H10O3 |
| Molecular Weight | 178.18 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 methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1958 |
Related Ipratropium Standards
- Ipratropium Impurity 30 (CAS 259092-15-4)
- Ipratropium Impurity 31 (CAS 3423-25-4)
- Ipratropium Bromide Impurity 36 (CAS CATO-C4X-166536)
- Ipratropium Bromide EP Impurity C (CAS 552-63-6)
- Ipratropium Impurity 17 (CAS 17838-69-6)
- Ipratropium Impurity 22 (CAS 3979-14-4)
- Ipratropium Bromide EP Impurity D (CAS 492-38-6)
- Ipratropium Impurity 25 (CAS CATO-C4X-166525)
Recommended Standards
- Bisoprolol Impurity 36 (CAS 14697-49-5)
- Butylphthalide Impurity 12 (CAS 2360-45-4)
- Ibuprofen EP Impurity K (CAS 43153-07-7)
- Esmolol Impurity 16 (CAS 19367-38-5)
- Famotidine impurity 67 (CAS 77345-71-2)
- Cefathiamidine Impurity 10 (CAS CATO-C4X-133710)
- Uridine Impurity 13 (CAS 1221169-70-5)
- 2-amino-1-(3,5-dimethylphenyl)ethan-1-ol (CAS 1249418-20-9)
- 2-bromo-3-ethynyl-pyridine (CAS 1028331-32-9)
- (2S)-2-Methyl-5-phenylpyrrolidine (CAS 1860017-96-4)
- (E)-2-(2-((E)-1,3,3-Trimethylindolin-2-ylidene)ethylidene)-3,4-dihydronaphthalen-1(2H)-one (CAS 53704-25-9)
- 2-((Cyclohexylmethyl)amino)-2-methylpropan-1-ol (CAS 932278-98-3)
- Methyl 2,6-Diaminohexanoate Dihydrochloride (CAS 34015-48-0)
- Semaglutide impurity 99 (CAS CATO-C4X-222699)
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