Montelukast Impurity N4 CAS 855473-50-6
| CAS No. | 855473-50-6 |
| Molecular Formula | C7H11BrO2 |
| Molecular Weight | 207.07 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 207.07 g/mol gives Montelukast Impurity N4 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Montelukast Impurity N4 (CAS 855473-50-6) is a certified pharmaceutical impurity reference standard with the molecular formula C7H11BrO2 and a molecular weight of 207.07 g/mol.
Montelukast Impurity N4 (C7H11BrO2) contains a carboxylic acid group, a hydroxyl group, an ether linkage, bromine substitution. Halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 certified reference material (CRM), Montelukast Impurity N4 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.
Physical & Chemical Properties
| Molecular Formula | C7H11BrO2 |
| Molecular Weight | 207.07 g/mol |
| Purity | >95% |
| Storage | Store at room temperature, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 2.0 |
| CAS Registry Year (est.) | 1987 |
| Halogen Content | Br-containing |
Related Montelukast Standards
- Montelukast Impurity 57 (CAS 30220-25-8)
- Montelukast Impurity 55 (CAS 152922-86-6)
- Montelukast Impurity 48 (CAS 87764-54-3)
- Montelukast Impurity 9 (CAS 30430-40-1)
- Montelukast Impurity 21 (CAS 152922-72-0)
- Montelukast Impurity N6 (CAS 66-40-0)
- Montelukast Impurity N27 (CAS 610-97-9)
- Montelukast Impurity 54 (CAS 89729-09-9)
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- 2,5,6-Trichloropyridin-3-amine (CAS 55304-76-2)
- 2,2,2-Trichloro-1-(5-chloro-1H-indol-3-yl)ethanone (CAS 1823480-57-4)
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