Levonorgestrel EP Impurity O CAS 155683-60-6
| CAS No. | 155683-60-6 |
| Molecular Formula | C22H32O3 |
| Molecular Weight | 344.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Levonorgestrel EP Impurity O.
As a process- or degradation-related impurity, Levonorgestrel EP Impurity O (CAS 155683-60-6, C22H32O3) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C22H32O3, Levonorgestrel EP Impurity O contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 344.49 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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.
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 | C22H32O3 |
| Molecular Weight | 344.49 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 chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
Related Levonorgestrel Standards
- Levonorgestrel-3-ethyldienol Ether (CAS 24908-87-0)
- Levonorgestrel Acetate Delta-5 Impurity (CAS 1175110-92-5)
- Levonorgestrel Impurity 40 (10R) (CAS CATO-C4X-167740)
- Levonorgestrel Impurity 41 (CAS CATO-C4X-167741)
- Levonorgestrel EP Impurity G (CAS 87585-03-3)
- Levonorgestrel EP Impurity H (CAS 55555-97-0)
- Levonorgestrel EP Impurity I (CAS 21508-50-9)
- Levonorgestrel EP Impurity I (CAS 20402-62-4)
Recommended Standards
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- [2-Chloro-3-fluoro-4-(methylsulfanyl)phenyl]methanol (CAS 2271442-97-6)
- 4,4-Bis(4-(quinolin-2-ylmethoxy)phenyl)cyclohexanecarboxylic acid (CAS 195050-52-3)
- Eledoisin Related Peptide (CAS 2990-43-4)
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