Ipratropium Impurity 17 CAS 17838-69-6
| CAS No. | 17838-69-6 |
| Molecular Formula | C11H12O3 |
| Molecular Weight | 192.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Ipratropium Impurity 17 (CAS 17838-69-6, C11H12O3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Ipratropium Impurity 17 (C11H12O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. The molecule exhibits a degree of unsaturation (DBE) of 6.0, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 192.21 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C11H12O3 |
| Molecular Weight | 192.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >90% |
| 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.) | 1962 |
Related Ipratropium Standards
- Ipratropium Impurity 22 (CAS 3979-14-4)
- Ipratropium Impurity 11 (CAS 5894-79-1)
- Ipratropium Impurity 25 (CAS CATO-C4X-166525)
- 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 Bromide EP Impurity D (CAS 492-38-6)
Recommended Standards
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- Zolpidem Tartrate EP Impurity C (CAS 4619-20-9)
- Butylphthalide Impurity 9 (CAS 19666-03-6)
- Lenalidomide Impurity 11 (CAS CATO-C4X-190311)
- Cefprozil Impurity N1(Z-Cefprozil) (CAS 121412-77-9)
- Avibactam Impurity 118 (CAS CATO-C4X-1348118)
- 2-Cyclohexyl-6-methyl-1,3,6,2-dioxazaborocane-4,8-dione (CAS 1104637-39-9)
- (S)-2-Amino-1-(3-((cyclopropylmethyl)amino)pyrrolidin-1-yl)ethanone (CAS 1354009-30-5)
- (3R)-3-((Tetrahydro-2H-pyran-2-yl)oxy)butan-1-ol (CAS 77610-95-8)
- 12-Hydroxydodecanenitrile (CAS 73782-16-8)
- 3-(2-Chlorophenyl)-N-isopropyl-2,5-dimethylpyrazolo[1,5-a]pyrimidin-7-amine (CAS 890634-67-0)
- BGT 226 (CAS 1245537-68-1)
- Characteristic MSH-Tetrapeptide (CAS 4289-02-5)
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