Pemetrexed Impurity CAS 1265908-60-8
| CAS No. | 1265908-60-8 |
| Molecular Formula | C21H23N5O6 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Pemetrexed Impurity (C21H23N5O6Na) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 13.0, corresponding to approximately 13 ring(s) or double-bond equivalent(s). With a molecular weight of 464.43 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO supplies Pemetrexed Impurity (CAS 1265908-60-8), a pharmacopoeial impurity reference standard (molecular formula C21H23N5O6Na, MW 464.43 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), Pemetrexed Impurity 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 | C21H23N5O6 Na |
| Molecular Weight | 464.43 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1990 |
| Nitrogen Atoms | 5 |
Related Pemetrexed Standards
- Pemetrexed Impurity 21 (CAS 1001-19-0)
- Pemetrexed Impurity 11 (CAS 100643-27-4)
- Pemetrexed Impurity 22 (CAS 1075-59-8)
- Pemetrexed Impurity 54 (CAS 1265908-58-4)
- Pemetrexed EP Impurity D Trisodium salt (CAS 1265908-59-5)
- Pemetrexed Impurity (CAS 1265908-61-9)
- Pemetrexed Impurity 53 (CAS 1320346-37-9)
- Pemetrexed Impurity 34 (CAS 1320346-43-7)
Recommended Standards
- Olaparib Impurity 101 (CAS CATO-C4X-1135101)
- 7-Hydroxy Quetiapine EP Impurity B (CAS 232597-73-8)
- Elagolix Impurity 101 (CAS CATO-C4X-2068101)
- N-[(1Z)-(Dimethylamino)methylidene]-1-(pyrimidin-2-yl)piperidine-4-carboxamide (CAS 338780-46-4)
- N-(2,4-Dimethoxyphenyl)benzofuro[3,2-d]pyrimidin-4-amine hydrochloride (CAS 1180027-29-5)
- Dapagliflozin Impurity 99 (CAS CATO-C4X-113899)
- Bis(furan-2-ylmethyl)amine hydrochloride (CAS 88545-04-4)
- Benzoyl-d5 Chloride (CAS 43019-90-5)
- Methyl 2-fluoro-5-hydroxynicotinate (CAS 1256804-76-8)
- (Thr(PO3H2)231)-Tau Peptide (225-237) trifluoroacetate salt (CAS 1670270-09-3)
Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com