Telmisartan Impurity N7 CAS 959987-48-5
| CAS No. | 959987-48-5 |
| Molecular Formula | C12H14N2O5 |
| Molecular Weight | 266.25 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Telmisartan Impurity N7 (C12H14N2O5) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Telmisartan Impurity N7 (CAS 959987-48-5) is a certified pharmaceutical impurity reference standard with the molecular formula C12H14N2O5 and a molecular weight of 266.25 g/mol.
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.
As a certified reference material (CRM), Telmisartan Impurity N7 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 | C12H14N2O5 |
| Molecular Weight | 266.25 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1987 |
| Nitrogen Atoms | 2 |
Related Telmisartan Standards
- Telmisartan Impurity 96 (CAS CATO-C4X-135996)
- Telmisartan Impurity 97 (CAS CATO-C4X-135997)
- Telmisartan impurity 76 (CAS CATO-C4X-135976)
- Telmisartan impurity 75 (CAS CATO-C4X-135975)
- Telmisartan Impurity 91 (CAS CATO-C4X-135991)
- Telmisartan impurity 73 (CAS CATO-C4X-135973)
- Telmisartan Impurity 34 (CAS 152628-01-8)
- Telmisartan Impurity 67 (CAS CATO-C4X-135967)
Recommended Standards
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- Venetoclax Impurity 55 (CAS 2514648-06-5)
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- Selumetinib Impurity 14 (CAS CATO-C4X-305314)
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- 2-(4-Amino-1h-pyrazol-1-yl)butanoic acid (CAS 1339722-95-0)
- 1-(thiophen-2-yl)-2-azabicyclo[3.2.0]heptane hydrochloride (CAS 1909326-03-9)
- Biotinyl-Pancreatic Polypeptide (human) trifluoroacetate salt (CAS 1816258-36-2)
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