Benzylpenicillin EP Impurity G CAS CATO-C4X-189935
| CAS No. | CATO-C4X-189935 |
| Molecular Formula | C14H20N2O4S |
| Molecular Weight | 312.38 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Benzylpenicillin EP Impurity G (CAS CATO-C4X-189935) is a certified pharmaceutical impurity reference standard with the molecular formula C14H20N2O4S and a molecular weight of 312.38 g/mol.
Based on its molecular formula C14H20N2O4S, Benzylpenicillin EP Impurity G 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 312.38 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.
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.
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 | C14H20N2O4S |
| Molecular Weight | 312.38 g/mol |
| Purity | 97%+ |
| 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 |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Benzylpenicillin Standards
- Benzylpenicillin Impurity 11 (CAS 118-53-6)
- Benzylpenicillin Potassium EP Impurity H (CAS 4493-18-9)
- Benzylpenicillin Impurity 48 (CAS CATO-C4X-189948)
- Benzylpenicillin EP Impurity F (2R,4S-Isomer) (CAS 73184-06-2)
- Benzylpenicillin EP Impurity F (CAS CATO-C4X-18996)
- Benzylpenicillin (Benzathine) tetrahydrate Impurity 24 (CAS 69239-61-8)
- Benzylpenicillin EP Impurity D (CAS 13093-87-3)
- Benzylpenicillin Impurity 54 (CAS 90962-63-3)
Recommended Standards
- N-(3-Methyl-1-(4-phenylthiazol-2-yl)-1H-pyrazol-5-yl)propionamide (CAS 1020488-00-9)
- Cefcapene Impurity 62 (CAS CATO-C4X-182462)
- N-(1-(Thiophene-2-carbonyl)indolin-6-yl)cyclopropanecarboxamide (CAS 1021207-01-1)
- Cefcapene Impurity 42 (CAS CATO-C4X-182442)
- Etomidate Impurity N3 (CAS 31502-34-8)
- Cetirizine EP Impurity C (CAS 83881-59-8)
- Ethosuximide impurity 16 (CAS 2024884-97-5)
- 1-(4-(6-(2-Methoxyphenyl)pyridazin-3-yl)piperazin-1-yl)butan-1-one (CAS 1049335-81-0)
- 6-Chloro-2-methylquinoxaline (CAS 1932-67-8)
- Cuprolinic Blue (CAS 41276-95-3)
- 7-Bromo-5-fluoro-3,4-dihydroquinolin-2(1H)-one (CAS 2055661-94-2)
- alpha,alpha-Difluoro-1-naphthaleneacetic Acid (CAS 73790-14-4)
- 3-(4-Methyl-1h-pyrazol-1-yl)butanenitrile (CAS 1006348-66-8)
- Semaglutide impurity 109 (CAS CATO-C4X-2226109)
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