Testosterone Impurity 13 CAS CATO-C4X-132613
| CAS No. | CATO-C4X-132613 |
| Molecular Formula | C21H30O3 |
| Molecular Weight | 330.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Testosterone Impurity 13 (CAS CATO-C4X-132613) is a certified pharmaceutical impurity reference standard with the molecular formula C21H30O3 and a molecular weight of 330.46 g/mol.
Owing to a steroid core, a hydroxyl group, an ether linkage, Testosterone Impurity 13 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 330.46 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
As a certified reference material (CRM), Testosterone Impurity 13 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 | C21H30O3 |
| Molecular Weight | 330.46 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 |
Related Testosterone Standards
- Testosterone EP Impurity E (CAS 1045-69-8)
- Testosterone Impurity 14 (CAS CATO-C4X-132614)
- Testosterone Propionate EP Impurity E (CAS 25862-97-9)
- Testosterone Propionate EP Impurity D (CAS 977-32-2)
- Testosterone Impurity N1 (CAS 165304-83-6)
- Testosterone Impurity N10 (CAS 26614-48-2)
- Testosterone 17-Formate (CAS 3129-42-8)
- Testosterone Impurity 57 (CAS 66290-08-2)
Recommended Standards
- Rocuronium Impurity 32 (CAS CATO-C4X-124232)
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- Topiramate Impurity 34 (CAS CATO-C4X-176834)
- Linagliptin impurity N2 (CAS 1446263-39-3)
- Mirabegron Impurity 24 (CAS CATO-C4X-103224)
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- 4-Bromo-N-ethyl-1h-pyrrole-2-carboxamide (CAS 1153795-60-8)
- Methyl 5-bromo-1-(oxan-2-yl)-1H-pyrazole-4-carboxylate (CAS 1434142-09-2)
- 2-{[5-(4-tert-Butylphenyl)-4-phenyl-4h-1,2,4-triazol-3-yl]sulfanyl}acetic acid (CAS 312522-54-6)
- Methyl (R)-cyclohex-3-ene-1-carboxylate (CAS 68000-20-4)
- Semaglutide Impurity 144 (CAS 394210-59-4)
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