Montelukast Impurity 55 CAS 152922-86-6
| CAS No. | 152922-86-6 |
| Molecular Formula | C7H11NO3S |
| Molecular Weight | 189.23 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Montelukast Impurity 55 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.
Montelukast Impurity 55 (CAS 152922-86-6) is a certified pharmaceutical impurity reference standard with the molecular formula C7H11NO3S and a molecular weight of 189.23 g/mol.
Structurally, Montelukast Impurity 55 (C7H11NO3S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 189.23 g/mol, it falls into the medium-molecular-weight range. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 | C7H11NO3S |
| Molecular Weight | 189.23 g/mol |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 2000 |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Montelukast Standards
- Montelukast Impurity N4 (CAS 855473-50-6)
- Montelukast Impurity 48 (CAS 87764-54-3)
- Montelukast Impurity 21 (CAS 152922-72-0)
- Montelukast Impurity 57 (CAS 30220-25-8)
- Montelukast Impurity N6 (CAS 66-40-0)
- Montelukast Impurity 54 (CAS 89729-09-9)
- Montelukast Impurity 39 (CAS 769-28-8)
- Montelukast Impurity 34 (CAS 162515-68-6)
Recommended Standards
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- 1,3,5-Triazine-2(1H)-thione, 6-phenyl- (CAS 1000018-63-2)
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