Montelukast (3R)-Hydroxy Benzoate CAS 150026-72-5
| CAS No. | 150026-72-5 |
| Molecular Formula | C28H24ClNO3 |
| Molecular Weight | 457.95 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Structurally, Montelukast (3R)-Hydroxy Benzoate (C28H24ClNO3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 17.0, corresponding to approximately 17 ring(s) or double-bond equivalent(s). With a molecular weight of 457.95 g/mol, it falls into the moderately-high-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Montelukast (3R)-Hydroxy Benzoate (CAS 150026-72-5), molecular formula C28H24ClNO3 and molecular weight 457.95 g/mol, is a CATO reference standard with documented purity and traceability.
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C28H24ClNO3 |
| Molecular Weight | 457.95 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| 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) | 17.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1999 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Montelukast Standards
- Montelukast Impurity 36 (CAS 142569-69-5)
- 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)
- Montelukast Impurity 19 (CAS 1258428-71-5)
- Montelukast 3-Oxo Benzoate (CAS 149968-11-6)
- Montelukast Impurity 11 (CAS 120578-04-3)
Recommended Standards
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