Captopril impurity 5 CAS CATO-C4X-11905
| CAS No. | CATO-C4X-11905 |
| Molecular Formula | C21H34N2O6S2 |
| Molecular Weight | 474.63 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.
Captopril impurity 5 (CAS CATO-C4X-11905) is a certified pharmaceutical impurity reference standard with the molecular formula C21H34N2O6S2 and a molecular weight of 474.63 g/mol.
Captopril impurity 5 (C21H34N2O6S2) contains a steroid core, 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
CATO manufactures Captopril impurity 5 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C21H34N2O6S2 |
| Molecular Weight | 474.63 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 2 |
Related Captopril Standards
- Captopril EP Impurity O (CAS CATO-C4X-119023)
- Captopril EP Impurity L (CAS CATO-C4X-11902)
- Captopril EP Impurity A (Captopril disulfide) (CAS 64806-05-9)
- Captopril impurity 1 (CAS CATO-C4X-11901)
- Captopril EP Impurity I (CAS CATO-C4X-119018)
- Captopril Impurity 29 (CAS CATO-C4X-119029)
- Captopril Impurity 42 (CAS CATO-C4X-119042)
- Captopril Impurity 28 (CAS CATO-C4X-119028)
Recommended Standards
- Travoprost Impurity 44 (CAS CATO-C4X-192544)
- (3aR,4R,5R,6aS)-Hexahydro-4-[(3R)-5-phenyl-3-[(tetrahydro-2H-pyran-2-yl)oxy]pentyl]-5-[(tetrahydro-2H-pyran-2-yl)oxy]-2H-cyclopenta[b]furan-2-ol (CAS 856453-29-7)
- Travoprost Impurity 45 (CAS CATO-C4X-192545)
- Bazedoxifene-d4 Acetate (CAS 1795027-71-2)
- Tedizolid Impurity 66 (CAS CATO-C4X-105466)
- Cholecalciferol impurity 23 (CAS 168609-17-4)
- Peptide Impurity 06 (CAS CATO-CPTD788806)
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- 1-(2,4-Dichlorophenyl)-1H-imidazole-4-carboxylic acid (CAS 952958-68-8)
- 1,1-dioxothiolane-3-carbaldehyde (CAS 3710-76-7)
- Bis(2,4-difluorophenylpyridinato)(5-(pyridin-2-yl)-1H-tetrazolate) iridium(III) (CAS 1219078-44-0)
- 1-(Tert-butyl) 2-methyl (2R,4R)-4-((tert-butyldimethylsilyl)oxy)pyrrolidine-1,2-dicarboxylate (CAS 114760-51-9)
- Acetyl Hexapeptide-39 (CAS 1382088-38-1)
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