Fenoterol EP Impurity B (Enantiomer Mixture) CAS 699525-61-6
| CAS No. | 699525-61-6 |
| Molecular Formula | C17H19NO4 |
| Molecular Weight | 301.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Fenoterol EP Impurity B (Enantiomer Mixture).
CATO supplies Fenoterol EP Impurity B (Enantiomer Mixture) (CAS 699525-61-6), a pharmacopoeial impurity reference standard (molecular formula C17H19NO4, MW 301.34 g/mol) used for the identification and quantification of trace impurities in APIs.
Fenoterol EP Impurity B (Enantiomer Mixture) (C17H19NO4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. The carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C17H19NO4 |
| Molecular Weight | 301.34 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 methanol, acetonitrile, DMSO, water (slightly soluble) |
| 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.) | 1985 |
| Nitrogen Atoms | 1 |
Related Fenoterol Standards
- Fenoterol EP Impurity A (S, R-Isomer) (CAS 391234-95-0)
- Fenoterol EP Impurity A(R,S-Isomer) (CAS 391234-97-2)
- Fenoterol (CAS 13392-18-2)
- Fenoterol Impurity 4 (CAS 161040-25-1)
- Fenoterol Impurity 6 (CAS CATO-C4X-20776)
- Fenoterol O-β-D-Glucuronide (CAS 61046-78-4)
- Fenoterol EP Impurity A HBr (CAS 38964-10-2)
- Fenoterol Hydrobromide Impurity B (CAS 3371-33-3)
Recommended Standards
- Lumateperone Impurity N6（and enantiomer） (CAS 313544-32-0)
- Amlodipine Impurity N13 (CAS 70677-78-0)
- Lumateperone Impurity N3 (CAS 313369-16-3)
- Boc-Asp(OcPent)-OH (CAS 71447-58-0)
- Barloxavir impurity 93 (CAS CATO-C4X-210893)
- Cefoperazone Impurity 14 (CAS CATO-C4X-114914)
- Cefazolin EP Impurity G (CAS 1172998-53-6)
- imidazo[1,5-a]pyridin-1-amine (CAS 1519867-88-9)
- L-Glutamic acid γ-(3-carboxy-4-hydroxyanilide) (CAS 74929-17-2)
- N-(3,5-Dimethylphenyl)-3-(3-methylphenyl)-2-(2H-1,2,3,4-tetrazol-5-yl)propanamide (CAS 483993-88-0)
- Trimellitic Anhydride (CAS 552-30-7)
- 1-(Trifluoromethyl)-2-thia-6-azaspiro[3.3]Heptane 2,2-dioxide oxalate (CAS 1980053-65-3)
- Ethyl 2-(3-((tert-butoxycarbonyl)amino)propoxy)benzoate (CAS 496064-26-7)
- Semaglutide impurity 68 (CAS CATO-C4X-222668)
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