Montelukast Impurity 11 CAS 120578-04-3
| CAS No. | 120578-04-3 |
| Molecular Formula | C28H18Cl2N2 |
| Molecular Weight | 453.36 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 453.36 g/mol gives Montelukast Impurity 11 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
CATO supplies Montelukast Impurity 11 (CAS 120578-04-3), a certified reference material (molecular formula C28H18Cl2N2, MW 453.36 g/mol) for analytical method development and quality control.
Structurally, Montelukast Impurity 11 (C28H18Cl2N2) contains a nitrogen-containing heterocyclic scaffold, a nitrile group, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 20.0, corresponding to approximately 20 ring(s) or double-bond equivalent(s). With a molecular weight of 453.36 g/mol, it falls into the moderately-high-molecular-weight range. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), Montelukast Impurity 11 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 | C28H18Cl2N2 |
| Molecular Weight | 453.36 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| 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) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 2 |
Related Montelukast Standards
- Montelukast 3-Oxo Benzoate (CAS 149968-11-6)
- Montelukast Impurity 19 (CAS 1258428-71-5)
- Montelukast Impurity 36 (CAS 142569-69-5)
- Montelukast (3R)-Hydroxy Benzoate (CAS 150026-72-5)
- Montelukast Impurity 10 (CAS 150026-75-8)
- Montelukast Impurity 31 (CAS 287930-77-2)
- Montelukast Impurity 47 (CAS 1079753-36-8)
- Montelukast Impurity 49 (CAS CATO-C4X-103149)
Recommended Standards
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- 4-(4-(4-Bromophenyl)-5-((3-methoxybenzyl)thio)-4H-1,2,4-triazol-3-yl)pyridine (CAS 477330-13-5)
- 3-[2-Cyano-3-(trifluoromethyl)phenoxy]phenyl 4,4,4-Trifluorobutane-1-sulfonate (CAS 406205-74-1)
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- (3-Fluoro-4-iodophenyl)methanol (CAS 1261615-96-6)
- 3-((Tetrahydro-2H-pyran-4-yl)oxy)propan-1-amine (CAS 933758-72-6)
- 4-methyl-3-(3-methylbutoxy)aniline hydrochloride (CAS 1333710-52-3)
- (S)-Morpholine-2-carbonitrile (CAS 1359658-57-3)
- 1-(2,6-Dichlorophenyl)-3-(3,4-difluorophenyl)propan-1-one (CAS 898777-52-1)
- 1-(4-Methylpiperidin-4-yl)-1H-pyrazole-4-carbaldehyde (CAS 2504241-19-2)
- 3-bromo-5-methoxy-1H-pyrrolo[2,3-b]pyridine (CAS 1053655-76-7)
- Semaglutide impurity 99 (CAS CATO-C4X-222699)
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