Piribedil Impurity 4 CAS CATO-C4X-28134
| CAS No. | CATO-C4X-28134 |
| Molecular Formula | C9H8Cl2O2 |
| Molecular Weight | 219.06 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Piribedil Impurity 4 is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Piribedil Impurity 4 (CAS CATO-C4X-28134) is a certified pharmaceutical impurity reference standard with the molecular formula C9H8Cl2O2 and a molecular weight of 219.06 g/mol.
Piribedil Impurity 4 (C9H8Cl2O2) 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).
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
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 | C9H8Cl2O2 |
| Molecular Weight | 219.06 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, 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) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
Related Piribedil Standards
- Piribedil Impurity 24 (CAS 1109275-97-9)
- Piribedil Impurity 12 (CAS CATO-C4X-281312)
- Piribedil Impurity N2 (CAS 263-29-6)
- Piribedil Impurity 6 (CAS 4971-68-0)
- Piribedil Impurity 18 (CAS CATO-C4X-281318)
- Piribedil Impurity N3 (CAS 129111-11-1)
- Piribedil Impurity N1 (CAS 75875-58-0)
- Piribedil Impurity 2 (CAS CATO-C4X-28132)
Recommended Standards
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- 2-(2,4-Dichlorophenoxy)acetimidamide (CAS 100607-02-1)
- Aciclovir EP Impurity K (CAS 1797131-64-6)
- Abemaciclib Impurity 48 (CAS CATO-C4X-293748)
- Mosapride Impurity 71 (CAS CATO-C4X-104471)
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- cis-4-Aminochroman-3-ol (CAS 58810-67-6)
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- 3,5-Dimethyl-4-(piperazin-1-ylsulfonyl)isoxazole (CAS 871217-52-6)
- (Ser(PO?H?)2?2)-Tau Peptide (260-264) PAb Blocking trifluoroacetate salt (CAS 2022956-57-4)
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