Clindamycin EP Impurity A CAS 154-21-2
| CAS No. | 154-21-2 |
| Molecular Formula | C18H34N2O6S |
| Molecular Weight | 406.54 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 Clindamycin EP Impurity A (CAS 154-21-2), a pharmacopoeial impurity reference standard (molecular formula C18H34N2O6S, MW 406.54 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C18H34N2O6S, Clindamycin EP Impurity A contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 406.54 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
CATO manufactures Clindamycin EP Impurity A 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 | C18H34N2O6S |
| Molecular Weight | 406.54 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) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Clindamycin Standards
- Clindamycin-DeA (CAS CATO-C4X-134192)
- Clindamycin Impurity 95 (CAS CATO-C4X-134195)
- Clindamycin Impurity 96 (CAS CATO-C4X-134196)
- Clindamycin EP Impurity B (CAS 18323-43-8)
- Clindamycin Impurity 4 (CAS CATO-C4X-13414)
- Clindamycin Impurity 66 (CAS CATO-C4X-134166)
- Clindamycin Impurity 69 (CAS 198080-64-7)
- Clindamycin Impurity 149 (CAS CATO-C4X-1341149)
Recommended Standards
- N-(6-cyclopropyl-7-(((1R,2R,5R)-6,6-dimethylbicyclo[3.1.1]heptan-2-yl)methoxy)-1H-4l4-[1,2,4]triazolo[4,3-a]pyridin-3-yl)methanesulfonamide (CAS 2459946-46-2)
- 6-[(E)-2-(4-Methylphenyl)ethenyl]-4-[(Z)-2-(4-methylphenyl)ethenyl]-2-(prop-2-yn-1-ylsulfanyl)pyridine-3-carbonitrile (CAS 303985-49-1)
- 6,7-Dimethoxy-3-(3-morpholinopropyl)-2-(propylthio)quinazolin-4(3H)-imine (CAS 383147-28-2)
- 6-(2-(4-(1H-Indol-3-yl)piperidin-1-yl)ethyl)-3,7-dimethyl-5H-thiazolo[3,2-a]pyrimidin-5-one (CAS 79449-97-1)
- Abiraterone Impurity 36 (CAS CATO-C4X-107036)
- Bifonazole Impurity 9 (CAS 7515-73-3)
- Etomidate Impurity 43 (CAS CATO-C4X-188443)
- 2-(1-(2-Chlorophenyl)cyclopropyl)acetic acid (CAS 1226178-88-6)
- Tert-butyl (3aR,6aS)-5-hydroxy-5-methylhexahydrocyclopenta[c]pyrrole-2(1H)-carboxylate (CAS 2567756-09-4)
- 5-Chloro-3-cyclopropoxy-2-ethylpyridine (CAS 1243445-52-4)
- 1,3-Dimethyl-5-{[5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)thiophen-2-yl]methylidene}-1,3-diazinane-2,4,6-trione (CAS 1449135-43-6)
- Timolol (CAS 26839-75-8)
- Butoxybenzene Impurity 15 (CAS 1126-75-6)
- Cholecystokinin Octapeptide (sulfated) (H-2060.0005) (CAS 25679-23-6)
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