Trospium Impurity 4 (Benzilide) CAS 467-32-3
| CAS No. | 467-32-3 |
| Molecular Formula | C28H20O4 |
| Molecular Weight | 420.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, a hydroxyl group, an ether linkage, Trospium Impurity 4 (Benzilide) is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 420.46 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 Trospium Impurity 4 (Benzilide) (CAS 467-32-3), a pharmacopoeial impurity reference standard (molecular formula C28H20O4, MW 420.46 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.
CATO manufactures Trospium Impurity 4 (Benzilide) under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C28H20O4 |
| Molecular Weight | 420.46 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 19.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
Related Trospium Standards
- Trospium Impurity 6 (CAS CATO-C4X-20386)
- Trospium Impurity 12 (CAS CATO-C4X-203812)
- Trospium Impurity 14 (CAS CATO-C4X-203814)
- Trospium Impurity 9 (CAS CATO-C4X-20389)
- Trospium Impurity N2 (CAS 16444-19-2)
- Trospium Impurity 5 (CAS CATO-C4X-20385)
- Trospium Impurity 17 (CAS CATO-C4X-203817)
- Trospium Impurity 18 (CAS CATO-C4X-203818)
Recommended Standards
- Cefminox impurity 51 (CAS CATO-C4X-192651)
- H-Ala-Pro-Tyr-Ala-OH (CAS 89045-46-5)
- Irinotecan EP Impurity G (CAS 947687-01-6)
- 1-(Tosyloxy)-3,6,9,12-tetraoxapentadecan-15-oic acid (CAS 2205504-91-0)
- Semaglutide Impurity 11 (CAS CATO-C4X-222611)
- Fluralaner Impurity 27 (CAS CATO-C4X-218027)
- Lifitegrast Impurity N12 (CAS 851785-70-1)
- 4-(Methylthio)-6-phenyl-1,3,5-triazin-2-amine (CAS 14945-93-8)
- 2-(Chloromethyl)-1H-indole (CAS 121384-27-8)
- 2-Amino-5-chloro-4-methylnicotinonitrile (CAS 1305712-87-1)
- Propofol EP Impurity N (CAS 13423-73-9)
- 3,4-Dimethyl-1-phenyl-1H-pyrazolo[3,4-b]pyridin-6-ol (CAS 17321-44-7)
- 4-[(4-Bromophenyl)sulfanyl]-6-{[(4-chlorophenyl)sulfanyl]methyl}-2-{[(4-fluorophenyl)methyl]sulfanyl}pyrimidine (CAS 341965-51-3)
- Des-Phe22-Tirzepatide (CAS CATO-CPTD788951)
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