Benzylpenicillin EP Impurity C Potassium Salt CAS 525-91-7 (free base)
| CAS No. | 525-91-7 (free base) |
| Molecular Formula | C16H17N2O5S |
| Molecular Weight | N/A |
| 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.
Benzylpenicillin EP Impurity C Potassium Salt (CAS 525-91-7 (free base)) is a certified pharmaceutical impurity reference standard with the molecular formula C16H17N2O5SK and a molecular weight of 388.48 g/mol.
The molecular framework of Benzylpenicillin EP Impurity C Potassium Salt (C16H17N2O5SK) is characterized by a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
CATO manufactures Benzylpenicillin EP Impurity C Potassium Salt under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C16H17N2O5S K |
| Molecular Weight | 388.48 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) | 9.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Benzylpenicillin Standards
- Benzylpenicillin Potassium EP impurity E (CAS 11039-68-2)
- Benzylpenicillin Impurity 11 (CAS 118-53-6)
- Benzylpenicillin Impurity 21(Mixture of Diastereomers) (CAS 13057-98-2)
- Benzylpenicillin EP Impurity D (CAS 13093-87-3)
- Benzylpenicillin Impurity 18 (CAS 22801-31-6)
- Benzylpenicillin Impurity 68 (CAS 30200-14-7)
- Benzylpenicillin Potassium EP Impurity I potassium salt (CAS 31447-86-6)
- Benzylpenicillin CP Impurity I (CAS 3264-88-8)
Recommended Standards
- Cholecalciferol impurity 18 (CAS 2227309-94-4)
- Sofosbuvir Impurity 31 (CAS CATO-C4X-105231)
- Methoxamine Impurity 16 (CAS 121347-31-7)
- (4,5,6,7-Tetrahydro-1H-benzo[d]imidazol-2-yl)methanol (CAS 26751-30-4)
- Tert-butyl 4-(5-aminopentyl)piperazine-1-carboxylate (CAS 848576-53-4)
- 1-([1,2,4]Triazolo[4,3-a]pyridin-3-yl)-N-methylmethanamine (CAS 933688-63-2)
- (S)-2-Acetyl-pyrrolidine hydrochloride (CAS 90427-71-7)
- N-Nitroso-Cyclamate (CAS 70365-40-1)
- Methyl 2-(2-cyanoethyl)-4,4-dimethyl-3-oxopentanoate (CAS 1384429-23-5)
- D-Leu26-Tirzepatide (CAS CATO-CPTD788908)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com