Tropicamide EP Impurity B CAS 57322-50-6
| CAS No. | 57322-50-6 |
| Molecular Formula | C17H18N2O |
| Molecular Weight | 266.34 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies Tropicamide EP Impurity B (CAS 57322-50-6), a pharmacopoeial impurity reference standard (molecular formula C17H18N2O, MW 266.34 g/mol) used for the identification and quantification of trace impurities in APIs.
Based on its molecular formula C17H18N2O, Tropicamide EP Impurity B contains a steroid core, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 266.34 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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), Tropicamide 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 | C17H18N2O |
| Molecular Weight | 266.34 g/mol |
| Purity | >90% |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 10.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1973 |
| Nitrogen Atoms | 2 |
Related Tropicamide Standards
- Tropicamide Impurity 11 (CAS 101112-51-0)
- Tropicamide (CAS 1508-75-4)
- Tropicamide Impurity 17 (CAS CATO-C4X-215017)
- Tropicamide Impurity 20 (CAS 2727060-69-5)
- Tropicamide Impurity 13 (CAS CATO-C4X-215013)
- Tropicamide Impurity 16 (CAS 1184914-87-1)
- Tropicamide Impurity 19 (CAS CATO-C4X-215019)
- Tropicamide Impurity 21 (CAS 96392-48-2)
Recommended Standards
- Proparacaine Impurity 29 (CAS CATO-C4X-202729)
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- Mirogabalin Impurity 214 (CAS CATO-C4X-2924214)
- Telmisartan Impurity 79 (CAS CATO-C4X-135979)
- Sitafloxacin Impurity 40 (CAS 144282-35-9)
- Landiolol Impurity 49 (CAS CATO-C4X-262149)
- 4-(Tert-butyl)benzothioamide (CAS 57774-77-3)
- 1,2-Benzenedimethanethiol, 4,5-dimethyl- (CAS 10230-61-2)
- 3-(Furan-3-yl)-4-methyl-1h-pyrazol-5-amine (CAS 1311185-34-8)
- Tenofovir alafenamide Impurity 89 (CAS CATO-C4X-179789)
- 5-(3,4-Difluorophenyl)-5-oxopentanoic acid (CAS 845790-46-7)
- 3-Chloro-1-phenyl-1H-1,2,4-triazole (CAS 33629-76-4)
- Semaglutide Impurity 11 (CAS CATO-C4X-222611)
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