Urapidil Impurity 76 HBr CAS 100939-96-6
| CAS No. | 100939-96-6 |
| Molecular Formula | C11H16N2O |
| Molecular Weight | N/A |
| 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.
Urapidil Impurity 76 HBr (CAS 100939-96-6) is a certified pharmaceutical impurity reference standard with the molecular formula C11H16N2OHBr and a molecular weight of 273.17 g/mol.
The molecular framework of Urapidil Impurity 76 HBr (C11H16N2OHBr) is characterized by a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, bromine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C11H16N2O HBr |
| Molecular Weight | 273.17 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1985 |
| Halogen Content | Br-containing |
| Nitrogen Atoms | 2 |
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Recommended Standards
- Finerenone Impurity 92 (CAS CATO-C4X-288092)
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- 6-Bromo-4-fluorobenzo[b]thiophene (CAS 826995-63-5)
- 58851-64-2 CTK1E8725 Naphth[2,3-b]oxirene, 1a,2,7,7a-tetrahydro-3,6-dimethoxy- (CAS 58851-64-2)
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- 2-Oxa-5-azabicyclo[2.2.1]heptane (CAS 279-33-4)
- Semaglutide impurity 194 (CAS CATO-C4X-2226194)
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