Terbinafine impurity 38 CAS CATO-C4X-133838
| CAS No. | CATO-C4X-133838 |
| Molecular Formula | C21H26NO |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Terbinafine impurity 38 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.
As a process- or degradation-related impurity, Terbinafine impurity 38 (CAS CATO-C4X-133838, C21H26NO) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Terbinafine impurity 38 (C21H26NO) contains a steroid core, an amide group, a hydroxyl group, an ether linkage. Its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C21H26NO |
| Molecular Weight | 308.44 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 9.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
Related Terbinafine Standards
- Terbinafine Hydroxy Benzoate (CAS 1076198-30-5)
- Terbinafine Carboxylic Acid Methyl Ester (Oxalate) (CAS 1076199-76-2)
- Terbinafine Impurity 4 (Mixture of Z and E Isomers) (CAS 114311-70-5)
- Terbinafine Impurity 5-d7 (CAS 1185238-58-7)
- Terbinafine-d7 Hydrochloride (CAS 1185240-27-0)
- Terbinafine Impurity 4 (CAS 125660-64-2)
- Terbinafine Impurity 10 (CAS 126764-17-8)
- Terbinafine-d3 HCl (N-methyl-d3) (CAS 1310012-15-7)
Recommended Standards
- Deferiprone Impurity 10 (CAS CATO-C4X-304810)
- Tadalafil Impurity 49 (CAS 1379883-12-1)
- Afatinib Impurity 60 (CAS CATO-C4X-100660)
- 5-(2-Cyclopentylpyrrolidin-1-yl)pentanoic acid hydrochloride (CAS 1834470-91-5)
- 1-(2,4-Dichlorophenyl)butane-1,3-dione (CAS 6823-18-3)
- O-(2-Azido-4,6-O-benzylidene-2-deoxy-α-D-galactopyranosyl)-N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-serine tert-Butyl Ester (CAS 878483-02-4)
- 11β,17,21-Trihydroxy-16α-methyl-pregn-4-ene-3,20-dione 21-Acetate (CAS 41020-56-8)
- rel-(3aR,6aS)-tert-Butyl 3a,6a-difluorohexahydropyrrolo[3,4-c]pyrrole-2(1H)-carboxylate (CAS 1330765-47-3)
- 2,3-Difluoro-4-iodophenylacetic acid (CAS 887586-60-9)
- Semaglutide Sodium Salt (CAS CATO-C4X-222620)
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