Cholecalciferol Impurity 21 CAS CATO-C4X-158621
| CAS No. | CATO-C4X-158621 |
| Molecular Formula | C20H31NO2 |
| Molecular Weight | 317.47 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 317.47 g/mol gives Cholecalciferol Impurity 21 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Cholecalciferol Impurity 21 (CAS CATO-C4X-158621, C20H31NO2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, Cholecalciferol Impurity 21 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 317.47 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
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.
CATO manufactures Cholecalciferol Impurity 21 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 | C20H31NO2 |
| Molecular Weight | 317.47 g/mol |
| Appearance | Off-white to pale 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Cholecalciferol Standards
- Cholecalciferol Impurity 20 (CAS CATO-C4X-158620)
- trans-Cholecalciferol (CAS 1260149-80-1)
- Cholecalciferol EP Impurity A (CAS 22350-41-0)
- Cholecalciferol Impurity 15 (CAS 42607-12-5)
- Cholecalciferol EP Impurity B (CAS 434-16-2)
- Cholecalciferol EP Impurity C (CAS 5226-01-7)
- Cholecalciferol EP Impurity D (CAS 22350-43-2)
- Cholecalciferol EP Impurity E (CAS 17592-07-3)
Recommended Standards
- Dutasteride Impurity 30 (CAS CATO-C4X-110330)
- Butenafine Impurity 11 (CAS 110951-99-0)
- Dutasteride Impurity 29 (CAS CATO-C4X-110329)
- Butenafine Impurity 14 (CAS 124830-38-2)
- Trimetazidine Impurity 20 (CAS 573-11-5)
- Lurbinectedin Impurity 21 (CAS 497871-67-7)
- Dotinurad Impurity 210 (CAS CATO-C4X-2494210)
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- 3,5-Bis(4-bromophenyl)-4H-1,2,4-triazole (CAS 55368-79-1)
- Liraglutide(3-31)TFA Salt (CAS CATO-C4X-19921)
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