Urapidil Impurity 39 CAS 2568071-92-9
| CAS No. | 2568071-92-9 |
| Molecular Formula | C21H29N5O5 |
| Molecular Weight | 431.49 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Urapidil Impurity 39 (CAS 2568071-92-9) is a certified pharmaceutical impurity reference standard with the molecular formula C21H29N5O5 and a molecular weight of 431.49 g/mol.
Based on its molecular formula C21H29N5O5, Urapidil Impurity 39 contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 431.49 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).
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 | C21H29N5O5 |
| Molecular Weight | 431.49 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >90% |
| Storage | Store in a cool place (≤25°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) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2001 |
| Nitrogen Atoms | 5 |
Related Urapidil Standards
- Urapidil Impurity 112 (CAS CATO-C4X-1924112)
- Urapidil Impurity 91 (CAS CATO-C4X-192491)
- Urapidil Impurity 64 (CAS CATO-C4X-192464)
- Urapidil Impurity 20 (CAS CATO-C4X-192420)
- Urapidil Impurity 9 (CAS 108997-11-1)
- Urapidil Impurity 22 (CAS CATO-C4X-192422)
- Urapidil Impurity 10 (CAS CATO-C4X-192410)
- Urapidil Impurity 12 (CAS 88733-12-4)
Recommended Standards
- N-Cyclohexyl-1-(furan-2-ylmethyl)-2-imino-10-methyl-5-oxo-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide (CAS 510760-89-1)
- Cinitapride Impurity 21 (CAS CATO-C4X-290821)
- N-Benzyl-1-(3-ethoxypropyl)-2-imino-5-oxo-2,5-dihydro-1H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide (CAS 510733-23-0)
- Capivasertib Impurity 32 (CAS CATO-C4X-331232)
- Avibactam Impurity 133 (CAS 1133931-73-3)
- Amoxicillin Impurity 38 (CAS CATO-C4X-114838)
- Posaconazole Impurity 89 (CAS 183871-34-3(Free Base))
- Tert-butyl 7-formyl-3-oxa-9-azabicyclo[3.3.1]Nonane-9-carboxylate (CAS 1894942-85-8)
- Methoxamine Impurity 5 (CAS 90253-98-8)
- 2-(Furan-2-yl)-5,6-dimethyl-1H-benzo[d]imidazole (CAS 91954-83-5)
- 4-Bromo-1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-1,2,3,5,6,7-hexahydro-s-indacene (CAS 1142818-90-3)
- 2-Amino-5-formylbenzonitrile (CAS 22782-40-7)
- 4-O-Benzyl Dopamine (CAS 94026-91-2)
- Adrenal Peptide E, bovine (CAS 78355-50-7)
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