Telmisartan EP Impurity B CAS 1026353-20-7
| CAS No. | 1026353-20-7 |
| Molecular Formula | C33H30N4O2 |
| Molecular Weight | 514.62 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, Telmisartan EP Impurity B is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 514.62 g/mol — guide the selection of appropriate sample preparation and analytical techniques. 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).
CATO supplies Telmisartan EP Impurity B (CAS 1026353-20-7), a pharmacopoeial impurity reference standard (molecular formula C33H30N4O2, MW 514.62 g/mol) used for the identification and quantification of trace impurities in APIs.
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.
As a certified reference material (CRM), Telmisartan EP Impurity B 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 | C33H30N4O2 |
| Molecular Weight | 514.62 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | >95% |
| Storage | Store in a cool place (≤25°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) | 21.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1988 |
| Nitrogen Atoms | 4 |
Related Telmisartan Standards
- Telmisartan (CAS 144701-48-4)
- Telmisartan Impurity 27 (CAS CATO-C4X-135927)
- Telmisartan EP Impurity F (CAS 915124-86-6)
- Telmisartan Impurity 81 (CAS CATO-C4X-135981)
- Telmisartan Impurity 84 (CAS CATO-C4X-135984)
- Telmisartan-d3 (CAS 1189889-44-8)
- Telmisartan-13C-d3 (CAS 1261396-33-1)
- Telmisartan-d4 (CAS CATO-C4X-135937)
Recommended Standards
- N-(6-Amino-3-methyl-1-(naphthalen-1-yl)-2,4-dioxo-1,2,3,4-tetrahydropyrimidin-5-yl)-3,5-di-tert-butyl-4-hydroxybenzamide (CAS 595558-82-0)
- Carbodenafil Impurity 1 (CAS CATO-C4X-25101)
- 2-((4-(2,4-Dimethylphenyl)-5-(2-hydroxyphenyl)-4H-1,2,4-triazol-3-yl)thio)-N-(5-phenyl-1,3,4-thiadiazol-2-yl)acetamide (CAS 835891-94-6)
- Alectinib Impurity 9 (CAS CATO-C4X-28369)
- Etizolam Impurity 5 (CAS CATO-C4X-35095)
- Lomefloxacin Impurity 22 Trifluoroacetate (CAS CATO-C4X-207322)
- Iomeprol Impurity 24 (CAS CATO-C4X-182024)
- 2-((4,5-Dihydro-1H-imidazol-2-yl)methyl)-1H-benzo[d]imidazole (CAS 119376-91-9)
- Resmetirom impurity 133 (CAS 1314924-95-2)
- 3-Amino-1-[3-(1h-imidazol-1-yl)propyl]-1,2-dihydropyridin-2-one (CAS 1247542-56-8)
- 1-Methyl-5-phenylpyrazin-2(1H)-one (CAS 78174-93-3)
- (4-(4-(Trifluoromethoxy)phenoxy)phenyl)boronic acid (CAS 958457-41-5)
- 865-33-8 A841711 sodium 2-[[(1S,2S,3aR,9aR)-2-hydroxy-1-[(3R)-3-hydroxyoctyl]-2,3,3a,4,9,9a-hexahydro-1H-cyclopenta[g]naphthalen-5-yl]oxy]acetate sodium 2-[[(1S,2S,3aR,9aR)-2-oxidanyl-1-[(3R)-3-oxidanyloctyl]-2,3,3a,4,9,9a-hexahydro-1H-cyclopenta[g]naphthalen-5-yl]oxy]ethanoate (CAS 865-33-8)
- [pGlu] Semaglutide (CAS CATO-C4X-2226288)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com