Lenalidomide Impurity 31 CAS 13365-26-9
| CAS No. | 13365-26-9 |
| Molecular Formula | C10H9NO6 |
| Molecular Weight | 239.18 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 239.18 g/mol gives Lenalidomide Impurity 31 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Lenalidomide Impurity 31 (CAS 13365-26-9) is a certified pharmaceutical impurity reference standard with the molecular formula C10H9NO6 and a molecular weight of 239.18 g/mol.
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Lenalidomide Impurity 31 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 239.18 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
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 | C10H9NO6 |
| Molecular Weight | 239.18 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1960 |
| Nitrogen Atoms | 1 |
Related Lenalidomide Standards
- Lenalidomide impurity 72 (CAS CATO-C4X-190372)
- Lenalidomide Impurity 23 (CAS 52090-24-1)
- Lenalidomide Impurity 60 (CAS 26581-81-7)
- Lenalidomide Impurity 26 (CAS 85535-45-1)
- Lenalidomide Impurity 30 (CAS 13726-85-7)
- Lenalidomide Impurity 25 (CAS 1218910-61-2)
- Lenalidomide Impurity 29 (CAS 31140-42-8)
- C5 Lenalidomide (CAS 191732-70-4)
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- 2,5-Bis(trifluoromethyl)benzamide (CAS 53130-46-4)
- 3-(Isothiocyanatomethyl)-4-methoxy-1H-indole (CAS 582304-82-3)
- Methyl 3-(difluoromethyl)-1H-indole-5-carboxylate (CAS 2112530-38-6)
- N-Benzyl-N-phenylaniline (CAS 606-87-1)
- [a-Glu](Side chain transposition)- Semaglutide (CAS CATO-C4X-2226111)
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