Methotrexate EP Impurity G CAS 2519848-42-9
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 2519848-42-9 |
| Molecular Formula | C28H29N9O6 |
| Molecular Weight | 587.59 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Methotrexate EP Impurity G (CAS 2519848-42-9) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C28H29N9O6. Molecular weight: 587.59 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C28H29N9O6 |
| Molecular Weight | 587.59 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| 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) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Nitrogen Atoms | 9 |
Related Methotrexate Standards
- Methotrexate Impurity 82 (CAS CATO-C4X-115482)
- Methotrexate Diglutamate (CAS 41600-13-9)
- Methotrexate Impurity 72 (CAS CATO-C4X-115472)
- Methotrexate Impurity 73 (CAS CATO-C4X-115473)
- Methotrexate impurity 57 (CAS CATO-C4X-115457)
- Methotrexate Impurity 83 (CAS CATO-C4X-115483)
- Methotrexate impurity 52 (CAS CATO-C4X-115452)
- Methotrexate Diethyl Ester (CAS 43170-88-3)
Recommended Standards
- H-Gly-Arg-Gly-Asp-Ser-Pro-OH (CAS 91037-75-1)
- Fluoxetine Impurity 21 (CAS CATO-C4X-135221)
- H-Gly-Arg-Gly-Asp-D-Ser-Pro-OH (CAS 111844-24-7)
- Famotidine impurity 75 (CAS 90924-16-6)
- Furazolidone Impurity 11 (CAS CATO-C4X-290111)
- Iodoethane-2-d1 (stabilized with copper) (CAS 57460-45-4)
- 4-Chloro-2-(trifluoromethoxy)benzoyl chloride (CAS 1261779-42-3)
- 2,2,2-Trichloroethyl(3-(tert-Butyl)-1-phenyl-1H-pyrazol-5-yl)carbamate (CAS 1005788-24-8)
- Benzyl7-oxo-5-azaspiro[2.4]heptane-5-carboxylate (CAS 400841-10-3)
- Semaglutide Impurity 3 (CAS CATO-C4X-22263)
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 13829788188 / jacky.chen@cato-chem.com