【货号停用，见C4X-127024】Cefaclor Impurity 18 CAS CATO-C4X-127018
| CAS No. | CATO-C4X-127018 |
| Molecular Formula | C30H26Cl2N6O7S2 |
| Molecular Weight | 717.60 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including 【货号停用，见C4X-127024】Cefaclor Impurity 18.
【货号停用，见C4X-127024】Cefaclor Impurity 18 (CAS CATO-C4X-127018) is a certified pharmaceutical impurity reference standard with the molecular formula C30H26Cl2N6O7S2 and a molecular weight of 717.60 g/mol.
Based on its molecular formula C30H26Cl2N6O7S2, 【货号停用，见C4X-127024】Cefaclor Impurity 18 contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 717.60 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).
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), 【货号停用，见C4X-127024】Cefaclor Impurity 18 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 | C30H26Cl2N6O7S2 |
| Molecular Weight | 717.60 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 6 |
| Sulfur Atoms | 2 |
Recommended Standards
- Dibenzo[c,h]indeno[1,2,3-kl]acridine (CAS 36762-09-1)
- Cefaclor Impurity 24 (CAS 142975-51-7)
- Di-μ-chlorotetrakis[(1,2-η)-cyclooctene]dirhodium (CAS 63902-12-5)
- (-)-1,2-Bis((2R,5R)-2,5-diphenylphospholano)ethane(1,5-cyclooctadiene)rhodium(I) (CAS 528565-83-5)
- Pitavastatin Impurity 41 (CAS CATO-C4X-103741)
- Tenofovir disoproxil Impurity 85 (CAS 707-99-3)
- Apixaban Impurity 167 (CAS CATO-C4X-1088167)
- 3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine (CAS 5399-44-0)
- Ethyl 3-Fluoro-5-(trifluoromethyl)pyridine-2-carboxylate (CAS 207994-07-8)
- 4-Chloro-3-(cyclopropylmethoxy)phenol (CAS 1243283-42-2)
- 5-(Chloromethyl)-1-[2-(2,2,2-trifluoroethoxy)ethyl]-1h-1,2,3,4-tetrazole (CAS 1342882-56-7)
- 2-(((5-(Pyridin-3-yl)-1H-1,2,4-triazol-3-yl)methyl)thio)-1H-benzo[d]imidazole (CAS 1171940-09-2)
- (S)-3-amino-1-isopropylpyrrolidin-2-one (CAS 1355040-67-3)
- Semaglutide impurity 100 (CAS CATO-C4X-2226100)
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