Calcium Dobesilate Impurity 7 CAS 4444-23-9
| CAS No. | 4444-23-9 |
| Molecular Formula | C6H6O8S2 |
| Molecular Weight | 270.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Calcium Dobesilate Impurity 7 (CAS 4444-23-9), a pharmacopoeial impurity reference standard (molecular formula C6H6O8S2, MW 270.24 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C6H6O8S2, Calcium Dobesilate Impurity 7 contains a carbohydrate-derived structure, a sulfone group; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 270.24 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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.
Physical & Chemical Properties
| Molecular Formula | C6H6O8S2 |
| Molecular Weight | 270.24 g/mol |
| Purity | >95% |
| Storage | Store in a cool place (≤25°C), keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| 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.) | 1958 |
| Sulfur Atoms | 2 |
Related Calcium Standards
- Calcium Dobesilate Impurity N3 (CAS 17724-11-7)
- Calcium Dobesilate Impurity 8 (CAS 81010-88-0)
- Calcium Dobesilate Impurity 24 (CAS CATO-C4X-205124)
- Calcium Dobesilate Impurity 25 (CAS CATO-C4X-205125)
- Calcium Dobesilate Impurity 14 (CAS CATO-C4X-205114)
- Calcium Dobesilate Impurity 26 (CAS CATO-C4X-205126)
- Calcium Dobesilate Impurity 23 (CAS CATO-C4X-205123)
- Calcium Dobesilate Impurity 4 (CAS 2429952-20-3)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com