Phenylbutyrate Impurity 18 CAS CATO-C4X-258318
| CAS No. | CATO-C4X-258318 |
| Molecular Formula | C23H30O4 |
| Molecular Weight | 370.48 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.
Phenylbutyrate Impurity 18 (CAS CATO-C4X-258318) is a certified pharmaceutical impurity reference standard with the molecular formula C23H30O4 and a molecular weight of 370.48 g/mol.
Structurally, Phenylbutyrate Impurity 18 (C23H30O4) contains a flavonoid core, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 9.0, corresponding to approximately 9 ring(s) or double-bond equivalent(s). With a molecular weight of 370.48 g/mol, it falls into the moderately-high-molecular-weight range. 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).
As a certified reference material (CRM), Phenylbutyrate Impurity 18 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 | C23H30O4 |
| Molecular Weight | 370.48 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
Related Phenylbutyrate Standards
- Phenylbutyrate Impurity 12 (CAS CATO-C4X-258313)
- Phenylbutyrate Impurity 7 (CAS 864811-35-8)
- Phenylbutyrate Impurity 8 (CAS 1443417-10-4)
- Phenylbutyrate Impurity 11 (CAS CATO-C4X-258311)
- Phenylbutyrate Impurity 15 (CAS 77063-20-8)
- Phenylbutyrate Impurity 12 (CAS CATO-C4X-258312)
- Phenylbutyrate Impurity 9 (CAS 54698-75-8)
- Phenylbutyrate Impurity 16 (CAS CATO-C4X-258316)
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