Olmesartan Impurity 62 CAS 91526-17-9
| CAS No. | 91526-17-9 |
| Molecular Formula | C6H6O5 |
| Molecular Weight | 158.11 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Olmesartan Impurity 62 is closely related to a carbohydrate-derived structure in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Olmesartan Impurity 62 (CAS 91526-17-9) is a certified pharmaceutical impurity reference standard with the molecular formula C6H6O5 and a molecular weight of 158.11 g/mol.
Structurally, Olmesartan Impurity 62 (C6H6O5) contains a carbohydrate-derived structure. The molecule exhibits a degree of unsaturation (DBE) of 4.0, corresponding to approximately 4 ring(s) or double-bond equivalent(s). With a molecular weight of 158.11 g/mol, it falls into the medium-molecular-weight range. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
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 | C6H6O5 |
| Molecular Weight | 158.11 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1983 |
Related Olmesartan Standards
- Olmesartan Impurity 64 (CAS 51802-42-7)
- Olmesartan Impurity 72 (CAS 95579-71-8)
- Olmesartan Impurity 3 (CAS 80841-78-7)
- Olmesartan Impurity 106 (CAS CATO-C4X-1097106)
- Olmesartan Impurity 63 (CAS 144690-06-2)
- Olmesartan Impurity 41 (CAS 1443544-27-1)
- Olmesartan Impurity 94 (CAS CATO-C4X-109794)
- Olmesartan Impurity 34 (CAS 116857-04-6)
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