Cefdinir Impurity 52 CAS 66338-96-3
| CAS No. | 66338-96-3 |
| Molecular Formula | C5H5N3O3S |
| Molecular Weight | 187.18 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Cefdinir Impurity 52 (C5H5N3O3S) contains an amide group, a sulfone group, a carboxylic acid 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).
CATO supplies Cefdinir Impurity 52 (CAS 66338-96-3), a pharmacopoeial impurity reference standard (molecular formula C5H5N3O3S, MW 187.18 g/mol) used for the identification and quantification of trace impurities in APIs.
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), Cefdinir Impurity 52 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 | C5H5N3O3S |
| Molecular Weight | 187.18 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1975 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Cefdinir Standards
- Cefdinir CP Impurity A (CAS 1450758-21-0)
- Cefdinir Impurity 34 (CAS 73150-67-1)
- Cefdinir Impurity 38 (CAS 37155-50-3)
- Cefdinir CP Impurity C (CAS 79349-82-9)
- Cefdinir Impurity 37 (CAS CATO-C4X-121037)
- Cefdinir Impurity 74 (CAS CATO-C4X-121074)
- Cefdinir USP Impurity A (CAS 178949-03-6)
- Cefdinir Impurity 53 (CAS 178422-40-7)
Recommended Standards
- 6-methoxy-5-nitropyrimidine-4-thiol (CAS 7154-33-8)
- 2-Acetamido-5-Nitrothiazole (CAS 140-40-9)
- 5-Nitrothiophene-2-Carbohydrazide (CAS 39978-44-4)
- (3aS,6R,6aS)-6-(Hydroxymethyl)-2,2-dimethyltetrahydro-4H-[1,3]dioxolo[4,5-c]pyrrol-4-one (CAS 1000391-63-8)
- Dronedarone Impurity 3 (CAS 141645-16-1)
- Evocalcet Impurity 38 (CAS 2167323-88-6)
- Spiramycin EP Impurity H (CAS CATO-C4X-23257)
- 4,5-Diphenyl-1H-imidazol-2(5H)-one (CAS 642-36-4)
- 4-(3-(3,4-Dimethylphenyl)-1,2,4-oxadiazol-5-yl)-2-(4-fluorophenyl)isoquinolin-1(2H)-one (CAS 1326849-89-1)
- 1-[3-(4-chlorophenyl)-1,2,4-oxadiazol-5-yl]ethan-1-one (CAS 1339787-73-3)
- trans-2-amino-4,4-difluoro-cyclohexanol;hydrochloride (CAS 1422130-46-8)
- Ethyl 6-cyclopropyl-6-oxohexanoate (CAS 898776-30-2)
- 4-Chloro-5-propyl-1H-pyrazol-3-amine (CAS 110580-34-2)
- Tirzepatide Impurity 37 (CAS CATO-C4X-324037)
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