Ceftriaxone Impurity 21 CAS CATO-C4X-116321
| CAS No. | CATO-C4X-116321 |
| Molecular Formula | C18H20N8O8S3 |
| Molecular Weight | 572.60 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 572.60 g/mol gives Ceftriaxone Impurity 21 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Ceftriaxone Impurity 21 (CAS CATO-C4X-116321) is a certified pharmaceutical impurity reference standard with the molecular formula C18H20N8O8S3 and a molecular weight of 572.60 g/mol.
Ceftriaxone Impurity 21 (C18H20N8O8S3) 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 aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Ceftriaxone Impurity 21 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 | C18H20N8O8S3 |
| Molecular Weight | 572.60 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 |
| Nitrogen Atoms | 8 |
| Sulfur Atoms | 3 |
Related Ceftriaxone Standards
- Ceftriaxone Impurity 20 (CAS CATO-C4X-116320)
- Ceftriaxone Impurity 32 (CAS CATO-C4X-116332)
- Ceftriaxone Oxide Impurity (CAS 97466-28-9)
- Ceftriaxone Impurity 27 (CAS CATO-C4X-116327)
- Ceftriaxone Impurity 25 (CAS CATO-C4X-116325)
- Ceftriaxone EP Impurity A (CAS 92143-31-2)
- Ceftriaxone Impurity 11 (CAS CATO-C4X-116311)
- Δ3-Ceftriaxone Isomer Impurity (CAS CATO-C4X-116314)
Recommended Standards
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- Ipragliflozin Impurity N3 (CAS 1034305-21-9)
- Ezetimibe Impurity 105 (CAS 1296129-16-2)
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