Dotinurad Impurity 33 CAS CATO-C4X-249433
| CAS No. | CATO-C4X-249433 |
| Molecular Formula | C22H13Cl4NO4S |
| Molecular Weight | 529.22 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Dotinurad Impurity 33.
Dotinurad Impurity 33 (CAS CATO-C4X-249433) is a certified pharmaceutical impurity reference standard with the molecular formula C22H13Cl4NO4S and a molecular weight of 529.22 g/mol.
Based on its molecular formula C22H13Cl4NO4S, Dotinurad Impurity 33 contains a flavonoid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 529.22 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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.
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 | C22H13Cl4NO4S |
| Molecular Weight | 529.22 g/mol |
| Purity | ＞95% |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 15.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Dotinurad Standards
- Dotinurad Impurity 22 (CAS CATO-C4X-249422)
- Dotinurad impurity 112 (CAS CATO-C4X-2494112)
- Dotinurad Impurity 202 (CAS CATO-C4X-2494202)
- Dotinurad Impurity 263 (CAS CATO-C4X-2494263)
- Dotinurad Impurity 259 (CAS CATO-C4X-2494259)
- Dotinurad Impurity 260 (CAS CATO-C4X-2494260)
- Dotinurad Impurity 190 (CAS CATO-C4X-2494190)
- Dotinurad Impurity 153 (CAS CATO-C4X-2494153)
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