Methotrexate Impurity 11 CAS 143873-72-7
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 143873-72-7 |
| Molecular Formula | C19H20N8O5 |
| Molecular Weight | 440.41 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Order Methotrexate Impurity 11 (CAS 143873-72-7) pharmaceutical standards reference standard from CATO: ISO 17034 accredited producer, 130,000+ catalog items in stock. Molecular formula: C19H20N8O5. Molecular weight: 440.41 g/mol. COA included with every batch.
Physical & Chemical Properties
| Molecular Formula | C19H20N8O5 |
| Molecular Weight | 440.41 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 |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 8 |
Related Methotrexate Standards
- Methotrexate EP Impurity B (CAS 54-62-6)
- Methotrexate Impurity 2 (CAS 80407-56-3)
- Methotrexate EP Impurity F (CAS 51865-79-3)
- Methotrexate Impurity 64 (CAS 52980-66-2)
- Methotrexate (CAS 59-05-2)
- Methotrexate EP Impurity C (CAS 2410-93-7)
- Methotrexate-d3 (CAS 432545-63-6)
- Methotrexate Impurity 69 (CAS CATO-C4X-115469)
Recommended Standards
- Ginkgolide C (CAS 15291-76-6)
- 5-[3-(3,4-Dimethoxyphenyl)-1,2,4-oxadiazol-5-yl]-3-(3,4,5-trimethoxyphenyl)-1,2,4-oxadiazole (CAS 1775439-98-9)
- Minocycline Impurity 69 (CAS CATO-C4X-169969)
- Methyl 5-bromo-3-chloro-6-hydroxypicolinate (CAS 1820612-76-7)
- Enopeptin A (CAS 139601-96-0)
- 5-Chloro-3-(3-fluorophenyl)-1,2-oxazole-4-carbaldehyde (CAS 1188031-85-7)
- Methyl 2-(2-chloroquinolin-5-yl)acetate (CAS 475215-58-8)
- 2-((Cyanomethyl)thio)-N-(p-tolyl)acetamide (CAS 669755-54-8)
- N,N-Didesmethyl Sibutramine-d7 HCl (CAS 1188263-87-7)
- Autocamtide-2-Related Inhibitory Peptide TFA (CAS 167114-91-2（free base）)
Why CATO?
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