Levonorgestrel Impurity 31 CAS CATO-C4X-167731
| CAS No. | CATO-C4X-167731 |
| Molecular Formula | C21H28O2 |
| Molecular Weight | 312.45 g/mol |
| 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.
Levonorgestrel Impurity 31 (CAS CATO-C4X-167731) is a certified pharmaceutical impurity reference standard with the molecular formula C21H28O2 and a molecular weight of 312.45 g/mol.
Structurally, Levonorgestrel Impurity 31 (C21H28O2) contains a steroid core, 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 312.45 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).
CATO manufactures Levonorgestrel Impurity 31 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H28O2 |
| Molecular Weight | 312.45 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Levonorgestrel Standards
- Levonorgestrel EP Impurity P (CAS 10021-05-4)
- Levonorgestrel EP Impurity P (CAS 100021-05-4)
- Levonorgestrel EP Impurity B (CAS 19914-67-1)
- Levonorgestrel Impurity 32 (CAS CATO-C4X-167732)
- Levonorgestrel Impurity 39 (CAS CATO-C4X-167739)
- Levonorgestrel (CAS 797-63-7)
- Levonorgestrel Impurity 2 (CAS 850-92-0)
- Levonorgestrel Impurity 42 (CAS 62298-52-6)
Recommended Standards
- L(+)-Norgestrel (CAS 797-64-8)
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- Progesterone EP Impurity H (CAS 1162-56-7)
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- Argatroban Impurity 91 (CAS CATO-C4X-100791)
- Prasugrel Impurity 32 (CAS 2460755-43-3)
- Peramivir Impurity 117 (CAS CATO-C4X-1833117)
- Pyronaridine Impurity 23 (CAS CATO-C4X-297823)
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- 3-Cyclopentyl-N-methylpropan-1-amine hydrochloride (CAS 1609400-01-2)
- His-Cyclic-Semaglutide (CAS CATO-C4X-2226182)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com