Montelukast CAS 158966-92-8
| CAS No. | 158966-92-8 |
| Molecular Formula | C35H36ClNO3S |
| Molecular Weight | 586.18 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Montelukast (C35H36ClNO3S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 18.0, corresponding to approximately 18 ring(s) or double-bond equivalent(s). With a molecular weight of 586.18 g/mol, it falls into the moderately-high-molecular-weight range. 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).
CATO supplies Montelukast (CAS 158966-92-8), a certified reference material (molecular formula C35H36ClNO3S, MW 586.18 g/mol) for analytical method development and quality control.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
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 | C35H36ClNO3S |
| Molecular Weight | 586.18 g/mol |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 18.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Montelukast Standards
- Montelukast EP Impurity A (CAS 220927-27-5)
- Montelukast EP Impurity G (CAS 774538-96-4)
- Montelukast EP Impurity H (CAS 851755-56-1)
- Montelukast Impurity 24 (CAS CATO-C4X-103124)
- Montelukast Amide (CAS 866923-63-9)
- Montelukast Impurity 2 (CAS CATO-C4X-10312)
- Montelukast Impurity N1 (CAS 162489-70-5)
- Montelukast Impurity 21 (CAS 142147-67-9)
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