Dequalinium impurity 33 CAS CATO-C4X-193633
| CAS No. | CATO-C4X-193633 |
| Molecular Formula | C30H39N3O |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
The molecular framework of Dequalinium impurity 33 (C30H39N3OCl) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution. In reversed-phase chromatography, its retention is governed primarily by its high hydrophobicity (logP), which provides a practical basis for HPLC-UV/DAD or LC-MS method development. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
CATO supplies Dequalinium impurity 33 (CAS CATO-C4X-193633), a pharmacopoeial impurity reference standard (molecular formula C30H39N3OCl, MW 493.11 g/mol) used for the identification and quantification of trace impurities in APIs.
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 | C30H39N3O 2*Cl |
| Molecular Weight | 493.11 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 12.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 3 |
Related Dequalinium Standards
- Dequalinium 2*Chloride x*Hydrate (CAS 1255077-34-9)
- Dequalinium Impurity 15 (CAS 15821-13-3)
- Dequalinium Impurity 4 (CAS 16355-92-3)
- Dequalinium EP Impurity C trichloride (CAS 171980-50-0)
- Dequalinium Chloride EP Impurity B chloride (CAS 171980-52-2)
- Dequalinium Impurity 7 (CAS 19056-26-9)
- Dequalinium iodide (CAS 2019-42-3)
- Dequalinium impurity 18 (CAS 2377370-96-0)
Recommended Standards
- Olaparib Impurity 11 (CAS 2250242-62-5)
- Bosutinib Impurity 16 (CAS CATO-C4X-184716)
- Brimonidine Impurity N3 (CAS 1158184-23-6)
- Indobufen Impurity 69 (CAS CATO-C4X-179269)
- 2-Benzyloxy-3-fluorobenzaldehyde (CAS 148872-79-1)
- 2-(5-Methyl-1H-indol-1-yl)ethan-1-amine (CAS 120194-96-9)
- Ceritinib Impurity 42 (CAS CATO-C4X-104842)
- 4-Bromoaniline hydrochloride (CAS 624-19-1)
- 2-Methyl-1H-benzo[d]imidazol-4-yl acetate (CAS 300686-53-7)
- Semaglutide impurity 266 (CAS CATO-C4X-2226266)
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