Doxazosin Impurity 19 CAS CATO-C4X-162319
| CAS No. | CATO-C4X-162319 |
| Molecular Formula | C10H11N3O3 |
| Molecular Weight | 221.21 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Doxazosin Impurity 19 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.
Doxazosin Impurity 19 (CAS CATO-C4X-162319) is a certified pharmaceutical impurity reference standard with the molecular formula C10H11N3O3 and a molecular weight of 221.21 g/mol.
Doxazosin Impurity 19 (C10H11N3O3) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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.
Physical & Chemical Properties
| Molecular Formula | C10H11N3O3 |
| Molecular Weight | 221.21 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 3 |
Related Doxazosin Standards
- Doxazosin Impurity 15 (CAS 60547-96-8)
- Doxazosin EP Impurity D (CAS 28888-44-0)
- Doxazosin Impurity 2 (CAS 4739-94-0)
- Doxazosin EP Impurity F (CAS 23680-84-4)
- Doxazosin Impurity 10 (CAS 3663-79-4)
- Doxazosin EP Impurity E (CAS 27631-29-4)
- Doxazosin EP Impurity A (CAS 3663-80-7)
- Doxazosin Impurity 20 (CAS CATO-C4X-162320)
Recommended Standards
- Indacaterol Impurity 91 (CAS CATO-C4X-150091)
- Glucosamine Sulfate EP Impurity A (CAS 7512-17-6)
- Indacaterol Impurity 33 (CAS CATO-C4X-150033)
- Glucosamine sulfate impurity 19 (CAS CATO-C4X-194619)
- Pralidoxime Chloride Impurity 6 (CAS 3785-03-3)
- Voglibose Impurity 1 (CAS 6564-72-3)
- Pramipexole Impurity 19 (CAS CATO-C4X-110719)
- 2-Bromo-5-chlorobenzohydrazide (CAS 1023565-25-4)
- Benzyl (2,4-difluorophenyl)carbamate (CAS 112434-18-1)
- 4-(Pyridin-4-ylmethyl)tetrahydro-2H-pyran-4-carboxylic acid (CAS 1393330-61-4)
- Tert-butyl (S)-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyrrolidine-1-carboxylate (CAS 149682-82-6)
- 2-((4-Methoxy-N-phenylphenyl)sulfonamido)-N-phenylacetamide (CAS 339013-40-0)
- 2-Methyl-1-(thiophen-2-ylmethyl)-1,2,3,4,5,6,7,8-octahydroisoquinoline (CAS 89413-11-6)
- (Cys2)-Neuropeptide Y-8-aminooctanoyl-(D-Cys27)-Neuropeptide Y (25-32) (H-3298.0500) (CAS 128806-04-2)
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