Sodium Fusidate EP Impurity A CAS 80445-74-5
| CAS No. | 80445-74-5 |
| Molecular Formula | C31H50O8 |
| Molecular Weight | 550.72 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Sodium Fusidate EP Impurity A (CAS 80445-74-5), a pharmacopoeial impurity reference standard (molecular formula C31H50O8, MW 550.72 g/mol) used for the identification and quantification of trace impurities in APIs.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, a polycyclic aromatic system, Sodium Fusidate EP Impurity A is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 550.72 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
As a certified reference material (CRM), Sodium Fusidate EP Impurity A meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C31H50O8 |
| Molecular Weight | 550.72 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1979 |
Related Sodium Standards
- Sodium Fusidate EP Impurity B (CAS CATO-C4X-11972)
- Sodium Fusidate Impurity 25 (CAS CATO-C4X-119725)
- Sodium Fusidate EP Impurity C (CAS CATO-C4X-11973)
- Sodium Fusidate EP Impurity D (CAS CATO-C4X-11974)
- Sodium Fusidate EP Impurity E (CAS CATO-C4X-11975)
- Sodium Fusidate EP Impurity F (CAS 1415035-94-7)
- Sodium Fusidate Impurity 20 (CAS CATO-C4X-119720)
- Sodium Fusidate EP Impurity G (CAS 4680-37-9)
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