Tinidazole Impurity 18 CAS 159790-76-8
| CAS No. | 159790-76-8 |
| Molecular Formula | C7H11N3O4S |
| Molecular Weight | 233.24 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Tinidazole Impurity 18 (CAS 159790-76-8), a pharmacopoeial impurity reference standard (molecular formula C7H11N3O4S, MW 233.24 g/mol) used for the identification and quantification of trace impurities in APIs.
Tinidazole Impurity 18 (C7H11N3O4S) contains an amide group, a sulfone group, a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. 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).
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 | C7H11N3O4S |
| Molecular Weight | 233.24 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO, water |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Nitrogen Atoms | 3 |
| Sulfur Atoms | 1 |
Related Tinidazole Standards
- Tinidazole Impurity 16 (CAS CATO-C4X-193016)
- Tinidazole Impurity 25 (CAS CATO-C4X-193025)
- Tinidazole Impurity 13 (CAS CATO-C4X-193013)
- Tinidazole Impurity 26 (CAS CATO-C4X-193026)
- Tinidazole EP Impurity B (CAS 25459-12-5)
- Tinidazole Impurity 6 (CAS CATO-C4X-19306)
- Tinidazole Impurity 7 (CAS 140165-54-4)
- Tinidazole (CAS 19387-91-8)
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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