Pemetrexed Impurity 76 Disodium Salt CAS CATO-C4X-172676
| CAS No. | CATO-C4X-172676 |
| Molecular Formula | C20H19N5O8 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Pemetrexed Impurity 76 Disodium Salt (C20H19N5O8Na) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 14.0, corresponding to approximately 14 ring(s) or double-bond equivalent(s). With a molecular weight of 480.39 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).
Pemetrexed Impurity 76 Disodium Salt (CAS CATO-C4X-172676) is a certified pharmaceutical impurity reference standard with the molecular formula C20H19N5O8Na and a molecular weight of 480.39 g/mol.
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 Pemetrexed Impurity 76 Disodium Salt 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 | C20H19N5O8 2*Na |
| Molecular Weight | 480.39 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| 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 1265908-60-8)
- Pemetrexed Impurity (CAS 1265908-61-9)
- Pemetrexed Impurity 53 (CAS 1320346-37-9)
Recommended Standards
- Ribavirin Impurity 12 (CAS CATO-C4X-141312)
- Dapoxetine Impurity 33 (CAS CATO-C4X-143933)
- Esmolol Impurity 3 (CAS CATO-C4X-18913)
- 5-(5-Bromo-2-fluoro-3-methylphenyl)oxazole (CAS 2364584-92-7)
- ethyl 5-(3-fluorophenyl)-1,3-oxaZole-4-carboxylate (CAS 127919-30-6)
- Methyl2-hydroxy-4-isopropylquinoline-3-carboxylate (CAS 672310-22-4)
- Ethylene Glycol Monoisopropyl Ether (CAS 109-59-1)
- 5-(1,1-Difluoroethyl)-1H-imidazole (CAS 2229580-72-5)
- 6-Hydroxy-1-naphthonitrile (CAS 130200-57-6)
- Semaglutide impurity 261 (CAS CATO-C4X-2226261)
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