Amoxicillin EP Impurity L CAS 1789703-32-7
| CAS No. | 1789703-32-7 |
| Molecular Formula | C24H29N5O7S2 |
| Molecular Weight | 563.65 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 563.65 g/mol gives Amoxicillin EP Impurity L distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Amoxicillin EP Impurity L (CAS 1789703-32-7), a pharmacopoeial impurity reference standard (molecular formula C24H29N5O7S2, MW 563.65 g/mol) used for the identification and quantification of trace impurities in APIs.
Amoxicillin EP Impurity L (C24H29N5O7S2) contains a flavonoid 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. 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).
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.
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.
Physical & Chemical Properties
| Molecular Formula | C24H29N5O7S2 |
| Molecular Weight | 563.65 g/mol |
| Purity | >90% |
| 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 2 |
Related Amoxicillin Standards
- Amoxicillin impurity 110 (CAS CATO-C4X-1148110)
- Amoxicillin Impurity 42 (CAS CATO-C4X-114842)
- Amoxicillin Clavulanate Potassium Dimer (CAS CATO-C4X-114865)
- Amoxicillin Impurity 109 (CAS CATO-C4X-1148109)
- Amoxicillin related compound M (CAS CATO-C4X-114824)
- Amoxicillin EP Impurity O（Mixture）(Discontinued,See C4X-114824) (CAS CATO-C4X-114826)
- Amoxicillin Impurity 44 (CAS CATO-C4X-114844)
- Amoxicillin Impurity 45 (CAS CATO-C4X-114845)
Recommended Standards
- 5-(4,6-Diphenyl-1,3,5-triazin-2-yl)-11-phenyl-5,11-dihydroindolo[3,2-b]carbazole (CAS 1643469-93-5)
- Avacopan Impurity 10 (CAS CATO-C4X-294510)
- 11-(4,6-Diphenyl-1,3,5-triazin-2-yl)-12-phenyl-11,12-dihydroindolo[2,3-a]carbazole (CAS 1024598-01-3)
- Ribociclib Impurity 34 (CAS CATO-C4X-310034)
- Nintedanib Impurity 32 (CAS 380427-39-4)
- Telmisartan Impurity 85 (CAS CATO-C4X-135985)
- Ketoprofen EP Impurity J Sodium Salt (CAS CATO-C4X-147120)
- Ethyl 2-(ethylamino)-3-(1h-1,2,4-triazol-1-yl)propanoate (CAS 1249058-58-9)
- 1-(2-Methyl-3-(trifluoromethyl)phenyl)-1H-pyrrole-2-carbaldehyde (CAS 2197063-05-9)
- Methyl 1-acetylcyclopentane-1-carboxylate (CAS 171924-94-0)
- (E)-4-(benzo[d][1,3]dioxol-5-yl)-2-(4-nitrostyryl)-5-oxo-5H-indeno[1,2-b]pyridine-3-carbonitrile (CAS 866142-86-1)
- (5-Bromo-2-methylphenyl)boronic acid (CAS 774608-13-8)
- (3-Chloro-4-((tetrahydro-2H-pyran-4-yl)amino)phenyl)boronic acid pinacol ester, 97% (CAS 1056465-07-6)
- Semaglutide impurity 88 (CAS CATO-C4X-222688)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com