Piribedil Impurity 3 CAS CATO-C4X-28133
| CAS No. | CATO-C4X-28133 |
| Molecular Formula | C7H7ClO2 |
| Molecular Weight | 158.58 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Piribedil Impurity 3 (CAS CATO-C4X-28133), a pharmacopoeial impurity reference standard (molecular formula C7H7ClO2, MW 158.58 g/mol) used for the identification and quantification of trace impurities in APIs.
Piribedil Impurity 3 (C7H7ClO2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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), Piribedil Impurity 3 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 | C7H7ClO2 |
| Molecular Weight | 158.58 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
Related Piribedil Standards
- Piribedil Impurity 2 (CAS CATO-C4X-28132)
- Piribedil Impurity N1 (CAS 75875-58-0)
- Piribedil Impurity N3 (CAS 129111-11-1)
- Piribedil Impurity 18 (CAS CATO-C4X-281318)
- Piribedil Impurity 20 (CAS 123492-93-3)
- Piribedil Impurity N3 (CAS 931-63-5)
- Piribedil Impurity 4 (CAS CATO-C4X-28134)
- Piribedil Impurity 24 (CAS 1109275-97-9)
Recommended Standards
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- 5-Chloro-2-methoxyphenol (CAS 3743-23-5)
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Why CATO?
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