Iguratimod Impurity 19 CAS CATO-C4X-182619
| CAS No. | CATO-C4X-182619 |
| Molecular Formula | C16H12N2O4 |
| Molecular Weight | 296.28 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Iguratimod Impurity 19 (CAS CATO-C4X-182619, C16H12N2O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Iguratimod Impurity 19 (C16H12N2O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, 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).
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 | C16H12N2O4 |
| Molecular Weight | 296.28 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 12.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
Related Iguratimod Standards
- Iguratimod Impurity 146 (CAS CATO-C4X-1826146)
- Iguratimod Impurity 6 (CAS 123664-84-6)
- Iguratimod impurity 94 (CAS CATO-C4X-182694)
- Iguratimod Impurity 58 (CAS CATO-C4X-182658)
- Iguratimod Impurity 60 (CAS CATO-C4X-182660)
- Iguratimod Impurity 128 (CAS CATO-C4X-1826128)
- Iguratimod Impurity 32 (CAS CATO-C4X-182632)
- Iguratimod Impurity 59 (CAS CATO-C4X-182659)
Recommended Standards
- Dolutegravir Impurity 51 (CAS CATO-C4X-162051)
- Regadenoson Impurity 35 (CAS CATO-C4X-198535)
- Pomalidomide Impurity 61 (CAS 147291-59-6)
- Benzoic Acid Impurity 2 (CAS 775304-03-5)
- Paliperidone Impurity 44 (CAS 118873-18-0)
- Fluvoxamine EP Impurity J (CAS 1217241-15-0)
- Simvastatin EP Impurity M (CAS 864357-87-9)
- Oseltamivir Impurity 47 (CAS 2081110-44-1（free base）)
- (6-(2,4-Dimethylpentan-3-yl)pyridin-3-yl)methanol (CAS 2137771-46-9)
- methyl 5-amino-2,3-dihydro-1H-indole-1-carboxylate (CAS 1019599-43-9)
- n'-Hydroxy-2-[(3-methoxyphenyl)methoxy]ethanimidamide (CAS 1016864-21-3)
- 2-((2-Chlorobenzyl)oxy)-5-methoxybenzaldehyde (CAS 888710-30-3)
- 3-(2-Bromophenyl)-5-((4-chlorobenzyl)thio)-4-phenyl-4H-1,2,4-triazole (CAS 443740-40-7)
- Semaglutide impurity 94 (CAS CATO-C4X-222694)
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