Labetalol Impurity 32 CAS 345933-79-1
| CAS No. | 345933-79-1 |
| Molecular Formula | C19H24N2O2 |
| Molecular Weight | 312.41 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Labetalol Impurity 32 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Labetalol Impurity 32 (CAS 345933-79-1) is a certified pharmaceutical impurity reference standard with the molecular formula C19H24N2O2 and a molecular weight of 312.41 g/mol.
Based on its molecular formula C19H24N2O2, Labetalol Impurity 32 contains a steroid 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 312.41 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.
Physical & Chemical Properties
| Molecular Formula | C19H24N2O2 |
| Molecular Weight | 312.41 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| 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) | 9.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
| Nitrogen Atoms | 2 |
Related Labetalol Standards
- Labetalol Impurity 51 (CAS CATO-C4X-246651)
- Labetalol Impurity 64 (CAS CATO-C4X-246664)
- Labetalol EP Impurity F (CAS 85665-85-6)
- Labetalol (CAS 36894-69-6)
- Labetalol EP Impurity A (CAS 1391051-99-2)
- Labetalol Impurity 30 (CAS CATO-C4X-246630)
- Labetalol Impurity 41 (CAS CATO-C4X-246641)
- Labetalol Impurity 42 (CAS CATO-C4X-246642)
Recommended Standards
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- Granisetron (CAS 109889-09-0)
- Apalutamide impurity 83 (CAS 143106-36-9)
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- Ceftezole Impurity 5 (CAS CATO-C4X-23095)
- 6-Chloro-n2,n4-bis(4-ethoxyphenyl)-1,3,5-triazine-2,4-diamine (CAS 78912-07-9)
- Neoastilbin (CAS 54081-47-9)
- (E)-2-((4-ethyl-5-styryl-4H-1,2,4-triazol-3-yl)thio)acetamide (CAS 478065-59-7)
- 6-hydroxy-4-methyl-1,2-dihydropyridin-2-one (CAS 4664-16-8)
- (S)-2,2-dimethyl-1-(2,4,5-trifluorophenyl)propan-1-amine (CAS 1389372-10-4)
- 2,7-Dipropyl-1,4-dihydropyrimido[4,5-d]pyrimidine (CAS 720-68-3)
- Peptide 74 (H-8545.0500) (CAS 132116-39-3)
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