Pioglitazone impurity 31 CAS CATO-C4X-138331
| CAS No. | CATO-C4X-138331 |
| Molecular Formula | C19H20N2O3S |
| Molecular Weight | 356.44 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.
Pioglitazone impurity 31 (CAS CATO-C4X-138331) is a certified pharmaceutical impurity reference standard with the molecular formula C19H20N2O3S and a molecular weight of 356.44 g/mol.
Based on its molecular formula C19H20N2O3S, Pioglitazone impurity 31 contains a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 356.44 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 | C19H20N2O3S |
| Molecular Weight | 356.44 g/mol |
| Purity | 97%+ |
| 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Pioglitazone Standards
- Pioglitazone (CAS 111025-46-8)
- Pioglitazone Impurity 21 (CAS 105355-26-8)
- Pioglitazone impurity 25 (CAS CATO-C4X-138325)
- Pioglitazone impurity 53 (CAS CATO-C4X-138353)
- Pioglitazone impurity 58 (CAS CATO-C4X-138358)
- (5Z)-Pioglitazone EP Impurity B (CAS 136401-69-9)
- Pioglitazone impurity 38 (CAS CATO-C4X-138338)
- Pioglitazone Impurity 6 (CAS 144809-28-9)
Recommended Standards
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- Mirabegron Impurity 68 (CAS CATO-C4X-103268)
- Propranolol Impurity N5 (CAS 20862-11-7)
- Proparacaine Impurity 27 (CAS CATO-C4X-202727)
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- 2-(5-(2,5-Dichlorophenyl)furan-2-yl)cyclopropanamine (CAS 1315344-42-3)
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- 3-Bromo-4-methoxybenzene-1,2-diamine (CAS 1831097-76-7)
- Zolmitriptan Impurity 32 (CAS CATO-C4X-135132)
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