Ketotifen Impurity 25 CAS CATO-C4X-204625
| CAS No. | CATO-C4X-204625 |
| Molecular Formula | C19H19NO3S |
| Molecular Weight | 341.42 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a steroid core, an amide group, a sulfone group, a hydroxyl group, an ether linkage, Ketotifen Impurity 25 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 341.42 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
As a process- or degradation-related impurity, Ketotifen Impurity 25 (CAS CATO-C4X-204625, C19H19NO3S) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
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 manufactures Ketotifen Impurity 25 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 | C19H19NO3S |
| Molecular Weight | 341.42 g/mol |
| Purity | >95% |
| Storage | Store at 2-8°C, 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Nitrogen Atoms | 1 |
| Sulfur Atoms | 1 |
Related Ketotifen Standards
- Ketotifen Impurity 27 (CAS CATO-C4X-204627)
- Ketotifen EP Impurity B (Enantiomer Mixture) (CAS 59743-88-3)
- Ketotifen Impurity 14 (CAS CATO-C4X-204614)
- Ketotifen Impurity 16 (CAS CATO-C4X-204616)
- Ketotifen EP Impurity C (CAS 126939-27-3)
- Ketotifen Impurity 26 (CAS CATO-C4X-204626)
- Ketotifen Impurity 35 (CAS CATO-C4X-204635)
- Ketotifen EP Impurity D (CAS 88456-70-6)
Recommended Standards
- Haloperidol EP Impurity A (CAS 3109-12-4)
- tert-Butyl (S)-2-(4-(methoxy(methyl)carbamoyl)thiazol-2-yl)pyrrolidine-1-carboxylate (CAS 1005342-77-7)
- Tert-butyl 3-((tosyloxy)methyl)azetidine-1-carboxylate (CAS 892408-42-3)
- Cyclopentyl(3,5-dimethyl-4-(morpholinosulfonyl)-1H-pyrazol-1-yl)methanone (CAS 1019105-35-1)
- Propofol Impurity 20 (CAS 2178-51-0)
- Lidocaine Impurity 46 (CAS CATO-C4X-167946)
- Arbidol Impurity 43 (CAS 40945-69-5)
- Tert-butyl 4-amino-2-phenylpyrrolidine-1-carboxylate (CAS 1554371-70-8)
- Ethyl 2-iodoisonicotinate (CAS 1308677-83-9)
- 5-(3-Chloro-5-methoxyphenyl)-1,2,3,6-tetrahydropyridine hydrochloride (CAS 2409597-32-4)
- 2-(3-Ethyl-1-methyl-1h-1,2,4-triazol-5-yl)pentan-2-amine (CAS 1342720-05-1)
- 1-(3-Chloro-5-fluorophenyl)-3-(4-(methylthio)phenyl)propan-1-one (CAS 898781-63-0)
- 5-Bromo-4-(tert-butyl)thiazol-2-amine hydrobromide (CAS 175136-77-3)
- Insulin Glargine (CAS 160337-95-1)
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