Calcium Dobesilate Impurity 4 CAS 2429952-20-3
| CAS No. | 2429952-20-3 |
| Molecular Formula | C9H12O5S |
| Molecular Weight | 232.25 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.
Calcium Dobesilate Impurity 4 (CAS 2429952-20-3) is a certified pharmaceutical impurity reference standard with the molecular formula C9H12O5S and a molecular weight of 232.25 g/mol.
The molecular framework of Calcium Dobesilate Impurity 4 (C9H12O5S) is characterized by a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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), Calcium Dobesilate Impurity 4 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 | C9H12O5S |
| Molecular Weight | 232.25 g/mol |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2000 |
| Sulfur Atoms | 1 |
Related Calcium Standards
- Calcium Dobesilate Impurity 23 (CAS CATO-C4X-205123)
- Calcium Dobesilate Impurity 26 (CAS CATO-C4X-205126)
- Calcium Dobesilate Impurity 2 (CAS CATO-C4X-20512)
- Calcium Dobesilate Impurity 14 (CAS CATO-C4X-205114)
- Calcium Dobesilate Impurity 3 (CAS CATO-C4X-20513)
- Calcium Dobesilate Impurity 24 (CAS CATO-C4X-205124)
- Calcium Dobesilate Impurity 25 (CAS CATO-C4X-205125)
- Calcium Dobesilate Impurity N3 (CAS 17724-11-7)
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