Cefdinir Impurity 93 CAS 206855-75-6
| CAS No. | 206855-75-6 |
| Molecular Formula | C16H17ClN2O6S |
| Molecular Weight | 400.83 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 Cefdinir Impurity 93.
Cefdinir Impurity 93 (CAS 206855-75-6) is a certified pharmaceutical impurity reference standard with the molecular formula C16H17ClN2O6S and a molecular weight of 400.83 g/mol.
Cefdinir Impurity 93 (C16H17ClN2O6S) contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), Cefdinir Impurity 93 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 | C16H17ClN2O6S |
| Molecular Weight | 400.83 g/mol |
| Purity | ≥95% |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2016 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Cefdinir Standards
- Cefdinir-13C-15N2 (CAS CATO-C4X-121027)
- Cefdinir (CAS 91832-40-5)
- Cefdinir CP Impurity R (CAS 178601-88-2)
- Cefdinir 7-isomer (CAS 178601-89-3)
- Cefdinir CP Impurity M (CAS 946573-41-7)
- Cefdinir CP Impurity F (CAS CATO-C4X-121023)
- Cefdinir Impurity 33 (CAS CATO-C4X-121033)
- Cefdinir CP Impurity B (CAS CATO-C4X-12107)
Recommended Standards
- 2-Chloro-1-{5-[4-(difluoromethoxy)-3-methoxyphenyl]-3-(thiophen-2-yl)-4,5-dihydro-1h-pyrazol-1-yl}ethan-1-one (CAS 731826-82-7)
- 1-(4-Chlorophenyl)-3-(2-(2-(3-methyl-4-nitroisoxazol-5-yl)vinyl)thiophen-3-yl)prop-2-en-1-one (CAS 256353-68-1)
- 3-[1-(3-Chloro-4-fluorobenzoyl)piperidin-4-yl]-4-phenyl-4,5-dihydro-1H-1,2,4-triazol-5-one (CAS 1775458-46-2)
- n-(4-(((3-Chloroquinoxalin-2-yl)(cyano)methyl)sulfonyl)phenyl)acetamide (CAS 568553-72-0)
- Ziprasidone Impurity 39 (CAS CATO-C4X-124039)
- Mometasone Impurity 36 (CAS CATO-C4X-170436)
- Sitagliptin Impurity 126 (CAS 1555495-76-5)
- 2-(1,1-Bis(4-fluorophenyl)ethoxy)ethan-1-amine (CAS 2306265-34-7)
- 5-(Furan-2-yl)-1H-indazole (CAS 885272-43-5)
- 3-(aminomethyl)-4-methylaniline (CAS 113135-68-5)
- 2-Amino-5-(methylthio)benzotrifluoride (CAS 59920-85-3)
- N-Nitroso-N-propylaniline (CAS 19788-34-2)
- N-Methyl-2-oxaspiro[3.3]heptan-6-amine (CAS 1363381-98-9)
- Semaglutide impurity 227 (CAS CATO-C4X-2226227)
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