Allisartan Isoproxil Impurity 37 CAS 135077-32-6
| CAS No. | 135077-32-6 |
| Molecular Formula | C35H28N4O2 |
| Molecular Weight | 536.62 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Allisartan Isoproxil Impurity 37 (C35H28N4O2) contains a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. 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 Allisartan Isoproxil Impurity 37 (CAS 135077-32-6), a pharmacopoeial impurity reference standard (molecular formula C35H28N4O2, MW 536.62 g/mol) used for the identification and quantification of trace impurities in APIs.
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 | C35H28N4O2 |
| Molecular Weight | 536.62 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| 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) | 24.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1995 |
| Nitrogen Atoms | 4 |
Related Allisartan Standards
- Allisartan Isoproxil Impurity 27 (CAS 947331-07-9)
- Allisartan Isoproxil (CAS 947331-05-7)
- Allisartan Isoproxil Impurity 16 (CAS 439904-79-7)
- Allisartan Isoproxil Impurity 12 (CAS CATO-C4X-321712)
- Allisartan Isoproxil Impurity 22 (CAS CATO-C4X-321722)
- Allisartan Isoproxil Impurity 35 (CAS CATO-C4X-321735)
- Allisartan Isoproxil Impurity 31 (CAS CATO-C4X-321731)
- Allisartan Isoproxil Impurity 32 (CAS CATO-C4X-321732)
Recommended Standards
- Nicardipine Impurity 71 (CAS CATO-C4X-171071)
- Upadacitinib Impurity 207 (CAS CATO-C4X-2405207)
- Avibactam Impurity 143 (CAS CATO-C4X-1348143)
- Upadacitinib Impurity 23 (CAS CATO-C4X-240523)
- Afoxolaner impurity 5 (CAS CATO-C4X-31375)
- Butylphthalide Impurity 30 (CAS 17475-41-1)
- Rotigotine EP Impurity G (CAS 1422357-33-2)
- 2,3,3',4,4',5-Hexachlorobiphenyl-2＇,6,6＇-d3 (CAS 1219798-44-3)
- Ethyl 3-Fluoro-5-(trifluoromethyl)pyridine-2-carboxylate (CAS 207994-07-8)
- 3-(2-Aminoethyl)-N-ethylbenzamide (CAS 1250203-94-1)
- n-(3-(Piperidin-1-yl)propyl)piperidine-4-carboxamide (CAS 926207-12-7)
- Lithium 3-carboxypropanoate (CAS 17229-80-0)
- 2-Butoxy-5-iodo-nicotinonitrile (CAS 334490-72-1)
- Anti-Inflammatory Peptide 1 (CAS 118850-71-8)
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