Ceftibuten Impurity 13 CAS 36923-19-0
| CAS No. | 36923-19-0 |
| Molecular Formula | C28H24N2O4S |
| Molecular Weight | 484.57 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
Ceftibuten Impurity 13 (CAS 36923-19-0) is a certified pharmaceutical impurity reference standard with the molecular formula C28H24N2O4S and a molecular weight of 484.57 g/mol.
Based on its molecular formula C28H24N2O4S, Ceftibuten Impurity 13 contains a steroid 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 484.57 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 | C28H24N2O4S |
| Molecular Weight | 484.57 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 |
| Degree of Unsaturation (DBE) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1967 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Ceftibuten Standards
- Ceftibuten Impurity 23 (CAS 51762-51-7)
- Ceftibuten Impurity 5 (CAS CATO-C4X-18905)
- Ceftibuten Impurity 14 (CAS CATO-C4X-189014)
- Ceftibuten Impurity 15 (CAS CATO-C4X-189015)
- (E)-Ceftibuten Dihydrate (CAS 1428117-81-0)
- Ceftibuten (CAS 97519-39-6)
- Ceftibuten Impurity 4 (CAS CATO-C4X-18904)
- Ceftibuten Impurity 8 (CAS 97519-40-9)
Recommended Standards
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- Glimepiride EP Impurity H (CAS CATO-C4X-11028)
- Phaclofen (CAS 114012-12-3)
- Carbocisteine Impurity 3 (CAS 88620-38-6)
- Isoflurane EP Impurity A (CAS 33018-78-9)
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- methyl 2-[(1-methoxy-1-oxopropan-2-yl)amino]-3-nitrobenzoate (CAS 1644599-14-3)
- 6-Chloro-N-cyclohexylpyrazin-2-amine (CAS 642459-26-5)
- 4-(Pyrimidin-4-yl)thiophen-2-amine (CAS 692891-75-1)
- (2S,4S)-1-(tert-Butoxycarbonyl)-4-[2-nitro-4-(tri-fluoromethyl)phenoxy]-2-pyrrolidinecarboxylic acid (CAS 1354484-53-9)
- (11bS)-4-Hydroxy-2,6-di(1-naphthyl)dinaphtho[2,1-d:1’,2’-f][1,3,2]dioxaphosphepine 4-Oxide (CAS 929097-93-8)
- 4'-Butyl-3-methyl-[1,1'-biphenyl]-4-carboxylic acid (CAS 1451206-48-6)
- Ginseng Tetrapeptide (CAS 178553-95-2)
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