Naftidrofuryl EP impurity B CAS 35997-58-1
| CAS No. | 35997-58-1 |
| Molecular Formula | C20H24O3 |
| Molecular Weight | 312.40 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C20H24O3, Naftidrofuryl EP impurity B contains a steroid core, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 312.40 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
Naftidrofuryl EP impurity B (CAS 35997-58-1) is a certified pharmaceutical impurity reference standard with the molecular formula C20H24O3 and a molecular weight of 312.40 g/mol.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
As a certified reference material (CRM), Naftidrofuryl EP impurity B meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C20H24O3 |
| Molecular Weight | 312.40 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
Related Naftidrofuryl Standards
- Naftidrofuryl impurity 1 (CAS 25379-26-4)
- Naftidrofuryl EP impurity E (CAS 3216-60-2)
- Naftidrofuryl EP impurity D (CAS 77454-16-1)
- Naftidrofuryl EP Impurity F (CAS 41359-72-2)
- Naftidrofuryl (CAS 31329-57-4)
- Naftidrofuryl-D4 (CAS 1215649-28-7)
- Naftidrofuryl EP Impurity C (CAS 115025-98-4)
- Naftidrofuryl Oxalate Impurity C (CAS 115025-99-5)
Recommended Standards
- Trenbolone Impurity 4 (CAS CATO-C4X-24744)
- Trenbolone-Acetate (CAS 10161-34-9)
- Denaverine Impurity 7 (CAS CATO-C4X-24127)
- 4-Hydroxy Ethynyl Estradiol (CAS 50394-90-6)
- Eplerenone Impurity 24 (CAS CATO-C4X-163024)
- Pregabalin Impurity 136 (CAS CATO-C4X-1312136)
- Teriflunomide Impurity 7 (CAS 854677-43-3)
- (4S,5S)-3-Mesityl-1-(2-methoxyphenyl)-4,5-diphenyl-4,5-dihydro-1H-imidazol-3-ium tetrafluoroborate (CAS 1629773-17-6)
- 23421-57-0 4-(Chloromethyl)-2-(4-methoxyphenyl)-1,3-thiazole--hydrogen chloride (1/1) DTXSID10583278 (CAS 23421-57-0)
- 7-Chloro-3-methyl-4H-pyrimido[1,2-b]pyridazin-4-one (CAS 86674-00-2)
- 10-Bromo-1,2,3,4,4a,5-hexahydrobenzo[b]pyrazino[1,2-d][1,4]diazepin-6(7H)-one (CAS 1252650-36-4)
- 1,3-Dihydro-5-(trifluoromethyl)-2H-indol-2-one 5-(Trifluoromethyl)indolin-2-one 5-(trifluoromethyl)-1,3-dihydroindol-2-one 71293-62-4 (CAS 71293-62-4)
- N,N,N',N'-Tetramethyl-1,2-diaminopropane (CAS 1822-45-3)
- Semaglutide impurity 80 (CAS CATO-C4X-222680)
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 18665070610 / Nicole.chen@cato-chem.com