Naproxen EP Impurity K CAS 77301-42-9
Purity >95%In StockPharmacopoeial Impurity Standards
| CAS No. | 77301-42-9 |
| Molecular Formula | C13H14O2 |
| Molecular Weight | 202.25 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
High-purity Naproxen EP Impurity K (CAS 77301-42-9) pharmacopoeial impurity standards reference standard. Molecular formula: C13H14O2. Molecular weight: 202.25 g/mol. Produced by CATO, one of China's leading reference material manufacturers, with COA documentation and global shipping.
Physical & Chemical Properties
| Molecular Formula | C13H14O2 |
| Molecular Weight | 202.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
Related Naproxen Standards
- Naproxen EP Impurity O (CAS 2471-70-7)
- Naproxen EP Impurity L (CAS 3900-45-6)
- Naproxen Impurity 29 (CAS 17056-94-9)
- Naproxen Impurity 32 (CAS 5672-94-6)
- Naproxen Impurity 40 (CAS 36815-04-0)
- Naproxen Impurity 52 (CAS CATO-C4X-170852)
- Naproxen Impurity 16 (CAS 34352-92-6)
- Naproxen Impurity 6 (CAS 174172-95-3)
Recommended Standards
- Glycopyrrolate Impurity 6 (CAS 126497-27-6)
- Butylphthalide Impurity 18 (CAS CATO-C4X-181318)
- Ondansetron Impurity 15 (CAS 27385-45-1)
- Samidorphan Impurity 11 (CAS 886588-57-4)
- Azilsartan Impurity 93 (CAS 1800532-35-7)
- 1-Cyclopentylpiperidin-4-amine dihydrochloride (CAS 952201-42-2)
- (2S,3R,4E)-2-Butyrylamino-4-hepten-1,3-diol 1644541-00-3 (CAS 1644541-00-3)
- Methyl 3,5-bis({1-[4-(trifluoromethyl)phenyl]-1H-1,2,3-triazol-4-yl}methoxy)benzoate (CAS 866039-44-3)
- 1,1,2-Trifluoropropane (CAS 66794-35-2)
- Semaglutide impurity 266 (CAS CATO-C4X-2226266)
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