Pemetrexed Impurity 25 CAS CATO-C4X-172625
| CAS No. | CATO-C4X-172625 |
| Molecular Formula | C25H28N6O9 |
| Molecular Weight | 556.52 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 556.52 g/mol gives Pemetrexed Impurity 25 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Pemetrexed Impurity 25 (CAS CATO-C4X-172625), a pharmacopoeial impurity reference standard (molecular formula C25H28N6O9, MW 556.52 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C25H28N6O9, Pemetrexed Impurity 25 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 556.52 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
As a certified reference material (CRM), Pemetrexed Impurity 25 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 | C25H28N6O9 |
| Molecular Weight | 556.52 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 6 |
Related Pemetrexed Standards
- Pemetrexed Impurity 37 (CAS 144051-68-3)
- Pemetrexed Impurity 71 (CAS CATO-C4X-172671)
- Pemetrexed Impurity (CAS 1265908-61-9)
- Pemetrexed Impurity 63 (CAS CATO-C4X-172663)
- Pemetrexed Impurity 55 (CAS CATO-C4X-172655)
- Pemetrexed Impurity 57 (CAS CATO-C4X-172657)
- Pemetrexed Impurity 52 (CAS CATO-C4X-172652)
- Pemetrexed Impurity 56 (CAS CATO-C4X-172656)
Recommended Standards
- Lansoprazole Impurity 10 (CAS 1083100-27-9)
- Niceritrol (CAS 5868-05-3)
- ((2S,3R,4R,5R)-4-acetoxy-3-azido-5-(6-benzamido-9H-purin-9-yl)tetrahydrofuran-2-yl)methyl 4-methylbenzoate (CAS 329773-21-9)
- (2R,3R,4R,5R)-2-(4-amino-2-oxo-1,3,5-triazin-1(2H)-yl)-5-((benzoyloxy)methyl)tetrahydrofuran-3,4-diyl dibenzoate (CAS 28998-36-9)
- Capecitabine EP Impurity B (CAS 3094-09-5)
- Ceritinib Impurity 87 (CAS 2976-70-7（free base))
- Remimazolam Impurity 14 (CAS CATO-C4X-282314)
- 2-(2-Methoxyethoxy)ethane-1-sulfonamide (CAS 1340363-76-9)
- D-Furaltadone hydrochloride (CAS 2818-22-6)
- 1-(2-(4-Methyl-6-(piperidin-1-yl)pyridin-3-yl)pyrrolidin-1-yl)ethanone (CAS 1352541-25-3)
- (S)-3-((tert-butoxycarbonyl)amino)-2-(2-(trifluoromethyl)benzyl)propanoic acid (CAS 1260614-42-3)
- Methyl 3-methyl-2-sulfanylbutanoate (CAS 67964-43-6)
- 5,6-difluoro-1H-indole-3-carbaldehyde (CAS 260267-07-0)
- Semaglutide Impurity 129 (CAS 2490269-79-7)
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