Doxazosin Impurity 11 CAS 102932-25-2
| CAS No. | 102932-25-2 |
| Molecular Formula | C22H23N5O5 |
| Molecular Weight | 437.45 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Doxazosin Impurity 11 (CAS 102932-25-2), a pharmacopoeial impurity reference standard (molecular formula C22H23N5O5, MW 437.45 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, Doxazosin Impurity 11 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 437.45 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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.
Physical & Chemical Properties
| Molecular Formula | C22H23N5O5 |
| Molecular Weight | 437.45 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1986 |
| Nitrogen Atoms | 5 |
Related Doxazosin Standards
- Doxazosin Impurity 12 (CAS 102932-26-3)
- S-Doxazosin (CAS 104874-86-4)
- R-Doxazosin (CAS 70918-17-1)
- Doxazosin impurity 21 (CAS CATO-C4X-162321)
- Doxazosin EP Impurity C (CAS 617677-53-9)
- Doxazosin Impurity 13 (CAS 102932-28-5)
- Doxazosin Impurity 14 (CAS 102932-29-6)
- Doxazosin Impurity 22 (CAS CATO-C4X-162322)
Recommended Standards
- Cefdinir CP Impurity S (CAS 127770-93-8)
- Cefdinir Impurity 30 (CAS CATO-C4X-121030)
- Fluticasone Impurity 79 (CAS CATO-C4X-165079)
- 3-Amino-N-(4-fluorophenyl)-4-(trifluoromethyl)-5,6,7,8,9,10-hexahydrocycloocta[b]thieno[3,2-e]pyridine-2-carboxamide (CAS 626228-08-8)
- Elagolix Impurity 4 (CAS 2316733-82-9)
- Ceftizoxime Impurity 53 (CAS CATO-C4X-179353)
- Ribociclib Impurity 16 (CAS CATO-C4X-310016)
- 2-(2,4-Dichlorophenyl)-3-(4-fluorophenyl)prop-2-enenitrile (CAS 363-06-4)
- Methyl 4-(2H-Tetrazol-5-yl)benzoate (CAS 82544-82-9)
- 3-(4-Bromo-2-formylphenoxy)propanenitrile (CAS 1378307-95-9)
- Methyl 2-{4-methoxy-1H-pyrrolo[2,3-b]pyridin-3-yl}-2-oxoacetate (CAS 611197-51-4)
- 1,1'-[(1S)-6,6'-Dimethoxy[1,1'-biphenyl]-2,2'-diyl]bis[1,1-bis[3,5-bis(1,1-dimethylethyl)-4-methoxyphenyl]phosphine (CAS 910134-30-4)
- rel-tert-Butyl (3R,4R)-3-hydroxy-4-(hydroxymethyl)piperidine-1-carboxylate (CAS 219975-81-2)
- SAMS Peptide (CAS 125911-68-4)
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