Silodosin Impurity 11 CAS 239463-74-2
| CAS No. | 239463-74-2 |
| Molecular Formula | C25H35N3O4 |
| Molecular Weight | 441.56 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 Silodosin Impurity 11.
CATO supplies Silodosin Impurity 11 (CAS 239463-74-2), a pharmacopoeial impurity reference standard (molecular formula C25H35N3O4, MW 441.56 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C25H35N3O4, Silodosin Impurity 11 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 441.56 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C25H35N3O4 |
| Molecular Weight | 441.56 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 3 |
Related Silodosin Standards
- Silodosin Depropanol Impurity1 (CAS 2052161-47-2)
- Silodosin Impurity 6 (CAS 2755910-23-5)
- Silodosin Impurity 15 (CAS 2052161-50-7)
- Silodosin Impurity 5 (CAS CATO-C4X-17545)
- Silodosin Impurity 9 (CAS 885340-13-6)
- Silodosin Impurity 7 (CAS 350797-56-7)
- Silodosin Impurity 1 (CAS 175870-21-0)
- Silodosin (CAS 160970-64-9)
Recommended Standards
- N-(3-(3-Methyl-4-(m-tolyl)piperazin-1-yl)-3-oxo-1-phenylpropyl)benzamide (CAS 851400-21-0)
- Etoricoxib Impurity 12 (CAS CATO-C4X-108012)
- 1-Hydroxy-4-((4-nonylphenyl)amino)anthracene-9,10-dione (CAS 88927-82-6)
- Orforglipron Impurity 12 (CAS 2212021-81-1)
- Hydroxychloroquine Impurity 28 (CAS CATO-C4X-183528)
- Erythromycin thiocyanate impurity C reduced derivative (CAS CATO-C4X-100167)
- Vancomycin EP Impurity B (CAS 555598-85-1)
- 3-(3,4-Difluorobenzyl)azetidine hydrochloride (CAS 1803582-01-5)
- 1-Bromo-4-(3-bromo-2,2-dimethylpropyl)benzene (CAS 1494008-96-6)
- 5'-Bromo-3'H-spiro[azetidine-3,1'-isobenzofuran] (CAS 2089316-24-3)
- 4-Amino-1-ethyl-1H-1,2,3-triazole (CAS 802915-18-0)
- 4-(tert-Butyl)-4-methyloxazolidine-2,5-dione (CAS 367274-60-0)
- 2-{[(3,4-dichlorophenyl)methyl]sulfanyl}-5-methoxy-4-[3-(trifluoromethyl)phenoxy]pyrimidine (CAS 339276-18-5)
- Cholecystokinin, CCK Tetrapeptide (30-33) (CAS 35144-91-3)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com