Telmisartan Impurity 65 CAS CATO-C4X-135965
| CAS No. | CATO-C4X-135965 |
| Molecular Formula | C12H15N2O5S |
| Molecular Weight | 299.32 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Telmisartan Impurity 65 (CAS CATO-C4X-135965), a pharmacopoeial impurity reference standard (molecular formula C12H15N2O5S, MW 299.32 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Telmisartan Impurity 65 (C12H15N2O5S) contains a nitrogen-containing heterocyclic scaffold, an amide group, a sulfone group, a hydroxyl group, an ether linkage. The molecule exhibits a degree of unsaturation (DBE) of 6.5, corresponding to approximately 6 ring(s) or double-bond equivalent(s). With a molecular weight of 299.32 g/mol, it falls into the medium-molecular-weight range. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
As a certified reference material (CRM), Telmisartan Impurity 65 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 | C12H15N2O5S |
| Molecular Weight | 299.32 g/mol |
| Purity | >95% |
| 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) | 6.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 2 |
| Sulfur Atoms | 1 |
Related Telmisartan Standards
- Telmisartan Impurity 40 (CAS 887583-89-3)
- Telmisartan EP Impurity A (CAS 152628-02-9)
- Telmisartan Impurity 12 (CAS 114772-38-2)
- Telmisartan Impurity 20 (CAS 150766-86-2)
- Telmisartan Impurity 11 (CAS 884330-09-0)
- Telmisartan Impurity 87 (CAS CATO-C4X-135987)
- Telmisartan Impurity N5 (CAS 567-15-7)
- Telmisartan Impurity 21 (CAS 147404-72-6)
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Why CATO?
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- 130,000+ catalog items in stock, COA supplied with every batch
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