rac-Amorolfine Impurity 18 (Mixture of Diastereomers) CAS CATO-C4X-154218
| CAS No. | CATO-C4X-154218 |
| Molecular Formula | C21H35NO2 |
| Molecular Weight | 333.51 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, rac-Amorolfine Impurity 18 (Mixture of Diastereomers) is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 333.51 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).
CATO supplies rac-Amorolfine Impurity 18 (Mixture of Diastereomers) (CAS CATO-C4X-154218), a pharmacopoeial impurity reference standard (molecular formula C21H35NO2, MW 333.51 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
As a certified reference material (CRM), rac-Amorolfine Impurity 18 (Mixture of Diastereomers) 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 | C21H35NO2 |
| Molecular Weight | 333.51 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related rac Standards
- Amorolfine EP impurity M (CAS CATO-C4X-154227)
- Amorolfine impurity 73 (CAS 78613-39-5)
- Amorolfine Impurity 74 (CAS CATO-C4X-154274)
- Amorolfine Impurity 92 (CAS CATO-C4X-154292)
- Amorolfine Impurity 43 (CAS CATO-C4X-154243)
- Amorolfine Impurity 44 (CAS CATO-C4X-154244)
- Amorolfine Hydrochloride - Impurity G (CAS 1260498-34-7)
- Amorolfine Impurity 59 (CAS CATO-C4X-154259)
Recommended Standards
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