Leflunomide EP Impurity D CAS 42831-50-5
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 42831-50-5 |
| Molecular Formula | C5H5NO3 |
| Molecular Weight | 127.10 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Leflunomide EP Impurity D (CAS 42831-50-5) is a high-purity pharmacopoeial impurity standards reference standard from CATO, an ISO 17034 accredited reference material producer. Molecular formula: C5H5NO3. Molecular weight: 127.10 g/mol. Each batch is supplied with a Certificate of Analysis (COA).
Physical & Chemical Properties
| Molecular Formula | C5H5NO3 |
| Molecular Weight | 127.10 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1969 |
| Nitrogen Atoms | 1 |
Related Leflunomide Standards
- Leflunomide Impurity 3 (CAS 2772495-33-5)
- Leflunomide Impurity 7 (CAS 88511-40-4)
- Leflunomide Impurity 18 (CAS 17153-20-7)
- Leflunomide Impurity 15 (CAS 4637-24-5)
- Leflunomide Impurity 17 (CAS 67305-24-2)
- Leflunomide Impurity 19 (CAS 51135-73-0)
- Leflunomide EP Impurity A (CAS 455-14-1)
- Leflunomide Impurity 14 (CAS 51145-57-4)
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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