Olmesartan Impurity 38 CAS 144690-07-3
| CAS No. | 144690-07-3 |
| Molecular Formula | C11H16N2O3 |
| Molecular Weight | 224.26 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage, Olmesartan Impurity 38 is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 224.26 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Olmesartan Impurity 38 (CAS 144690-07-3) is a certified pharmaceutical impurity reference standard with the molecular formula C11H16N2O3 and a molecular weight of 224.26 g/mol.
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.
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 | C11H16N2O3 |
| Molecular Weight | 224.26 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1998 |
| Nitrogen Atoms | 2 |
Related Olmesartan Standards
- Olmesartan impurity 104 (CAS 2163824-95-9)
- Olmesartan Impurity 30 (CAS 157356-73-5)
- Olmesartan Impurity 23 (CAS CATO-C4X-109723)
- Olmesartan Impurity 97 (CAS 2190488-06-1)
- Olmesartan Impurity 48 (CAS 144690-04-0)
- Olmesartan Impurity 39 (CAS 2411637-68-6)
- Olmesartan Impurity 18 (CAS 144689-93-0)
- Olmesartan Impurity 93 (CAS CATO-C4X-109793)
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