Cefoperazone Impurity N3 CAS 73240-09-2
| CAS No. | 73240-09-2 |
| Molecular Formula | C23H23N5O8S |
| Molecular Weight | 529.52 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Cefoperazone Impurity N3 (CAS 73240-09-2), a pharmacopoeial impurity reference standard (molecular formula C23H23N5O8S, MW 529.52 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C23H23N5O8S, Cefoperazone Impurity N3 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 529.52 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C23H23N5O8S |
| Molecular Weight | 529.52 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) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 5 |
| Sulfur Atoms | 1 |
Related Cefoperazone Standards
- Cefoperazone EP Impurity A (CAS 73240-08-1)
- Cefoperazone Impurity 17 (CAS CATO-C4X-114917)
- Cefoperazone Impurity 32 (CAS CATO-C4X-114932)
- Cefoperazone Impurity 12 (CAS 698339-10-5)
- Cefoperazone Ring Opening Lactone (CAS CATO-C4X-114920)
- Cefoperazone Impurity 57 (CAS CATO-C4X-114957)
- Cefoperazone Impurity 41 (CAS CATO-C4X-114941)
- Cefoperazone Impurity 65 (CAS CATO-C4X-114965)
Recommended Standards
- Nilotinib Impurity 9 (CAS 641571-05-3)
- 1-Cyclopropyl-7-[4-[(2,3-dihydro-1,4-benzodioxin-6-yl)sulfonyl]-1-piperazinyl]-6-fluoro-1,4-dihydro-4-oxo-3-quinolinecarboxylic acid (CAS 743441-94-3)
- Nilotinib (CAS 641571-10-0)
- 5-Bromo-3-(2-nitrovinyl)-1H-indole (CAS 25217-77-0)
- Ibuprofen impurity 137 (CAS CATO-C4X-1082137)
- Empagliflozin impurity 216 (CAS CATO-C4X-1065216)
- Pitolisant Impurity 50 (CAS 90562-26-8)
- 5H-Pyrrolo[2,3-d]pyrimidin-4-amine (CAS 13510-11-7)
- (4-(Difluoromethyl)-6-methoxy-5-methylpyridin-2-yl)methanol (CAS 1805607-72-0)
- {[1-(3-methoxyphenyl)-1H-imidazol-2-yl]thio}acetic acid (CAS 851288-52-3)
- 2-Ethynyl-3-fluoro-6-methylpyridine (CAS 1824076-35-8)
- Methyl 2-(5-bromo-3-hydroxypyridin-2-yl)acetate (CAS 1256792-09-2)
- 4-(6-Methoxy-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-yl)morpholine (CAS 1883761-43-0)
- D-Val23-Tirzepatide (CAS CATO-CPTD788911)
Why CATO?
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