Vilanterol Impurity 37 CAS 452339-70-7
| CAS No. | 452339-70-7 |
| Molecular Formula | C22H31NO7 |
| Molecular Weight | 421.48 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Vilanterol Impurity 37 (CAS 452339-70-7), a pharmacopoeial impurity reference standard (molecular formula C22H31NO7, MW 421.48 g/mol) used for the identification and quantification of trace impurities in APIs.
Vilanterol Impurity 37 (C22H31NO7) 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 presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C22H31NO7 |
| Molecular Weight | 421.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 1 |
Related Vilanterol Standards
- Vilanterol Impurity 42 (CAS CATO-C4X-193542)
- Vilanterol Impurity 77 (CAS CATO-C4X-193577)
- Vilanterol Impurity 85 (CAS CATO-C4X-193585)
- Vilanterol Impurity 72 (CAS CATO-C4X-193572)
- Vilanterol Impurity 33 (CAS CATO-C4X-193533)
- Vilanterol Impurity 46 (CAS CATO-C4X-193546)
- Vilanterol Impurity 13 (CAS CATO-C4X-193513)
- Vilanterol Impurity 14 (CAS CATO-C4X-193514)
Recommended Standards
- Betamethasone Impurity 87 (CAS 1549-35-5)
- Verticillatine (CAS 10247-54-8)
- Citalopram Impurity 54 (CAS CATO-C4X-110954)
- Niraparib Impurity N19 (CAS 1038916-08-3)
- Cefuroxime impurity 104 (CAS CATO-C4X-1245104)
- Avanafil Impurity 74 (CAS 372118-67-7)
- N-Nitroso Fentanyl Impurity 17 (CAS CATO-C4X-134617)
- Diphenoxylate Hydrochloride (CAS 3810-80-8)
- 5-((Trimethylsilyl)ethynyl)-2,2'-bipyridine (CAS 187026-84-2)
- 2,4-Dimethoxybenzothiazole (CAS 858635-78-6)
- 2-chloro-N-methyl-N-phenylpyridine-4-carboxamide (CAS 1019383-16-4)
- Hydrocortisone EP Impurity M (CAS 566-35-8)
- methyl 2-amino-7H-pyrrolo[2,3-d]pyrimidine-6-carboxylate (CAS 1638768-40-7)
- Semaglutide impurity 261 (CAS CATO-C4X-2226261)
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