Methotrexate Dihydrate CAS 1212284-68-8
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 1212284-68-8 |
| Molecular Formula | C20H22N8O5 2*H2O |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Methotrexate Dihydrate (CAS 1212284-68-8) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C20H22N8O5 2*H2O. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C20H22N8O5 2*H2O |
| Molecular Weight | 472.46 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 | 8 |
Related Methotrexate Standards
- Methotrexate Impurity 41 (CAS 101810-76-8)
- Methotrexate Hydrate EP Impurity B (CAS 1217459-90-9)
- Methotrexate Hydrate (CAS 133073-73-1)
- Methotrexate Impurity 11 (CAS 143873-72-7)
- Methotrexate EP Impurity E (CAS 19741-14-1)
- Methotrexate EP Impurity C (CAS 2410-93-7)
- Methotrexate EP Impurity G (CAS 2519848-42-9)
- Methotrexate EP Impurity G Sodium Salt (CAS 2519848-42-9（free base）)
Recommended Standards
- Ethyl 2-(aminomethyl)-4-methyloxazole-5-carboxylate (CAS 689739-62-6)
- 3-Cyclopropyl-6-(4-((5,6,7,8-tetrahydronaphthalen-2-yl)sulfonyl)piperazin-1-yl)-[1,2,4]triazolo[4,3-b]pyridazine (CAS 1040641-42-6)
- Bis((1-methyl-1h-pyrazol-4-yl)methyl)amine (CAS 1006446-08-7)
- 2-(2-Hydroxy-2-phenylethyl)-6-phenylpyridazin-3(2H)-one (CAS 59594-40-0)
- (3E)-3-(1-{[4-(trifluoromethoxy)phenyl]amino}ethylidene)oxolan-2-one (CAS 866132-73-2)
- 1-((4-Ethoxyphenyl)amino)-3-methyl-3H-naphtho[1,2,3-de]quinoline-2,7-dione (CAS 303225-49-2)
- Myristoyl Pentapeptide-4 (CAS 1392416-25-9)
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