Benzylpenicillin Impurity 29 CAS 58678-43-6
| CAS No. | 58678-43-6 |
| Molecular Formula | C14H21N3O6S |
| Molecular Weight | 359.40 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.
Benzylpenicillin Impurity 29 (CAS 58678-43-6) is a certified pharmaceutical impurity reference standard with the molecular formula C14H21N3O6S and a molecular weight of 359.40 g/mol.
Based on its molecular formula C14H21N3O6S, Benzylpenicillin Impurity 29 contains a nitrogen-containing heterocyclic scaffold, 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 359.40 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 | C14H21N3O6S |
| Molecular Weight | 359.40 g/mol |
| Purity | >90% |
| Storage | Store at 2-8°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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Benzylpenicillin Standards
- Benzylpenicillin Impurity 30 (CAS 525-94-0)
- Benzylpenicillin Potassium EP impurity E (CAS 11039-68-2)
- Benzylpenicillin Impurity 21(Mixture of Diastereomers) (CAS 13057-98-2)
- Benzylpenicillin EP Impurity E (CAS CATO-C4X-18995)
- Benzylpenicillin impurity 58 (CAS 493-39-0)
- Benzylpenicillin Impurity 25 (CAS CATO-C4X-189925)
- Benzylpenicillin Impurity 82 (CAS CATO-C4X-189982)
- Benzylpenicillin Impurity 10 (CAS 34104-15-9)
Recommended Standards
- Omeprazole Impurity 41 (CAS CATO-C4X-125541)
- 3-cyano-4,6-dimethyl-2-pyridinyl 4-[(dimethylamino)sulfonyl]benzenecarboxylate 400077-15-8 KS-000030UP (CAS 400077-15-8)
- Biapenem impurity 27 (CAS CATO-C4X-227327)
- 328559-44-0 2-[(2E)-1-(1,1-Dioxido-1,2-benzothiazol-3-yl)-2-(4-methoxybenzylidene)hydrazinyl]ethanol MFCD01821800 (CAS 328559-44-0)
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- 1-Bromo-4-(2,6-difluoro-4-(trifluoromethyl)phenoxy)-2,3-difluorobenzene (CAS 2244084-87-3)
- Benzo[d]isothiazole-6-carbaldehyde (CAS 1516012-10-4)
- Guanosine Hydrate (CAS 1143525-19-2)
- 7-Hydroxy-5-methoxy-8-(morpholinomethyl)-2-phenyl-4H-chromen-4-one (CAS 920445-66-5)
- n,n-Diethyl-2-methylpyrimidine-4-carboxamide (CAS 1280816-18-3)
- Peptide Impurity 06 (CAS CATO-CPTD788806)
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