Cephalexin Impurity 42 CAS 52210-38-5
| CAS No. | 52210-38-5 |
| Molecular Formula | C16H17N3O5S |
| Molecular Weight | 363.39 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Cephalexin Impurity 42 (CAS 52210-38-5) is a certified pharmaceutical impurity reference standard with the molecular formula C16H17N3O5S and a molecular weight of 363.39 g/mol.
Cephalexin Impurity 42 (C16H17N3O5S) 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. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), Cephalexin Impurity 42 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 | C16H17N3O5S |
| Molecular Weight | 363.39 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cephalexin Standards
- Cephalexin Oxide Impurity 1 (CAS 56193-21-6)
- Cephalexin Sulfoxide Impurity 31 (CAS 74708-55-7)
- Cephalexin Impurity 15 (CAS 36114-06-4)
- Cephalexin Impurity 13 (CAS 1323247-65-9)
- Cephalexin Impurity 19 (CAS CATO-C4X-126119)
- Cephalexin-d5 Hydrate (CAS CATO-CCHM703163)
- Cephalexin-d5 (CAS CATO-C4X-12611)
- Cephalexin-d5 (CAS 2101505-56-8)
Recommended Standards
- Torasemide Impurity 44 (CAS CATO-C4X-183644)
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- Dalbavancin Impurity 22 (CAS CATO-C4X-160222)
- Baloxavir Marboxil Impurity 182 (CAS CATO-C4X-2108182)
- Fluconazole EP Impurity D (CAS 81886-51-3)
- (3,5-Dimethoxybenzyl)(4-methoxybenzyl)amine hydrobromide (CAS 1609409-23-5)
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- 2-(((4-Chlorophenyl)amino)methylene)cyclohexane-1,3-dione (CAS 62370-44-9)
- Turpentine oil (CAS 8006-64-2)
- 6-Amino-5,7-dihydro-4H-purin-2-ol (CAS 606490-06-6)
- 4-(Aminomethyl)-2-ethoxyphenol (CAS 90643-06-4)
- Liraglutide Impurity 25 (CAS CATO-C4X-199225)
Why CATO?
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