Tranilast Impurity 1 CAS 70806-55-2
| CAS No. | 70806-55-2 |
| Molecular Formula | C18H17NO5 |
| Molecular Weight | 327.33 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO supplies Tranilast Impurity 1 (CAS 70806-55-2), a pharmacopoeial impurity reference standard (molecular formula C18H17NO5, MW 327.33 g/mol) used for the identification and quantification of trace impurities in APIs.
Tranilast Impurity 1 (C18H17NO5) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage. 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 | C18H17NO5 |
| Molecular Weight | 327.33 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Nitrogen Atoms | 1 |
Related Tranilast Standards
- Tranilast Impurity 2 (CAS 91920-58-0)
- Tranilast (CAS 53902-12-8)
- Tranilast Impurity 8 (CAS 320777-16-0)
- Tranilast Impurity 13 (CAS CATO-C4X-252913)
- Tranilast Impurity 7 (CAS 93755-77-2)
- Tranilast impurity 5 (CAS 697235-52-2)
- Tranilast Impurity 12 (CAS CATO-C4X-252912)
- Tranilast Impurity 11 (CAS CATO-C4X-252911)
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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