Brinzolamide Impurity 3 CAS CATO-C4X-19403
| CAS No. | CATO-C4X-19403 |
| Molecular Formula | C20H34N2O9S3 |
| Molecular Weight | 542.69 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Brinzolamide Impurity 3 (CAS CATO-C4X-19403), a pharmacopoeial impurity reference standard (molecular formula C20H34N2O9S3, MW 542.69 g/mol) used for the identification and quantification of trace impurities in APIs.
Brinzolamide Impurity 3 (C20H34N2O9S3) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone 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).
As a certified reference material (CRM), Brinzolamide Impurity 3 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.
Physical & Chemical Properties
| Molecular Formula | C20H34N2O9S3 |
| Molecular Weight | 542.69 g/mol |
| 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 3 |
Related Brinzolamide Standards
- Brinzolamide Impurity 4 (CAS CATO-C4X-19404)
- Brinzolamide Impurity 5 (CAS CATO-C4X-19405)
- Brinzolamide Impurity 10 (CAS CATO-C4X-194010)
- Brinzolamide Impurity 11 (CAS CATO-C4X-194011)
- Brinzolamide Impurity 24 (CAS CATO-C4X-194024)
- Brinzolamide Impurity 9 (CAS CATO-C4X-19409)
- Brinzolamide Impurity 22 (CAS CATO-C4X-194022)
- Brinzolamide Impurity 27 (CAS CATO-C4X-194027)
Recommended Standards
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- Indocyanine Green Impurity 8 (CAS 63450-66-8)
- Posaconazole Impurity 280 (CAS 1350560-52-9)
- Anastrozole Impurity 25 (CAS CATO-C4X-123925)
- Regorafenib Impurity 9 (CAS CATO-C4X-10479)
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- 2-(3-Amino-1h-pyrazol-1-yl)-N,N-dimethylpropanamide (CAS 1183575-41-8)
- 4-Phenoxy-2-(trifluoromethyl)aniline (CAS 106877-21-8)
- Carbetocin Impurity 36 (CAS CATO-C4X-191136)
- 1-bromo-3-[(2-methoxyethoxy)methyl]benzene (CAS 1251156-96-3)
- Galanin-Like Peptide (porcine) trifluoroacetate salt (CAS 245114-96-9)
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