Pyrimethamine EP Impurity D CAS 55474-41-4
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 55474-41-4 |
| Molecular Formula | C13H14ClNO2 |
| Molecular Weight | 251.71 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
High-purity Pyrimethamine EP Impurity D (CAS 55474-41-4) pharmacopoeial impurity standards reference standard. Molecular formula: C13H14ClNO2. Molecular weight: 251.71 g/mol. Produced by CATO, one of China's leading reference material manufacturers, with COA documentation and global shipping.
Physical & Chemical Properties
| Molecular Formula | C13H14ClNO2 |
| Molecular Weight | 251.71 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1972 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Pyrimethamine Standards
- Pyrimethamine-D3 (CAS 1189936-99-9)
- Pyrimethamine (CAS 58-14-0)
- Pyrimethamine Impurity 1 (CAS 772-79-2)
- Pyrimethamine Impurity 4 (CAS 91284-15-0)
- Pyrimethamine N3-Oxide (CAS CATO-C4X-20441)
- Pyrimethamine Impurity 3 (CAS 3275-44-3)
- Pyrimethamine EP Impurity A (CAS 55474-40-3)
- Pyrimethamine EP Impurity C (CAS 140-53-4)
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