Falecalcitriol impurity 6 CAS CATO-C4X-31416
| CAS No. | CATO-C4X-31416 |
| Molecular Formula | C18H24F6O |
| Molecular Weight | 370.37 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Falecalcitriol impurity 6.
CATO supplies Falecalcitriol impurity 6 (CAS CATO-C4X-31416), a pharmacopoeial impurity reference standard (molecular formula C18H24F6O, MW 370.37 g/mol) used for the identification and quantification of trace impurities in APIs.
Falecalcitriol impurity 6 (C18H24F6O) contains a steroid core, a hydroxyl group, an ether linkage, fluorine substitution. Halogen substitution raises its density and boiling point, its high carbon-to-hydrogen ratio confers good lipid solubility; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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 | C18H24F6O |
| Molecular Weight | 370.37 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at room temperature |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure |
| Degree of Unsaturation (DBE) | 4.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
Related Falecalcitriol Standards
Recommended Standards
- Tegoprazan Impurity 120 (CAS CATO-C4X-2297120)
- 4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-2-[(2-fluorophenyl)methyl]-1H,2H,3H,5H,6H,7H,8H-pyrido[1,2-c]pyrimidine-1,3-dione (CAS 1775345-51-1)
- tert-Butyl 2-oxo-7-(trifluoromethyl)spiro[indoline-3,4'-piperidine]-1'-carboxylate (CAS 2089315-14-8)
- 4-(5-Ethyl-1,2,4-oxadiazol-3-yl)-2-[(3-fluorophenyl)methyl]-1H,2H,3H,5H,6H,7H,8H-pyrido[1,2-c]pyrimidine-1,3-dione (CAS 1775353-73-5)
- Penicillamine Impurity 32 (CAS CATO-C4X-29232)
- Exemestane Impurity 30 (CAS 14895-71-7)
- Ampicillin Impurity 99 (CAS CATO-C4X-144399)
- Tert-butyl 3-[(piperidin-3-yl)carbamoyl]piperidine-1-carboxylate (CAS 1016495-72-9)
- 4-[(Diethylamino)methyl]benzonitrile (CAS 69293-74-9)
- 3-[2-(1-Piperidinyl)ethoxy]benzaldehyde hydrochloride (CAS 138351-09-4)
- Mianserin Impurity 123 (CAS CATO-C4X-1369123)
- 2,6-Dibromoimidazo[1,2-a]pyridine (CAS 851916-83-1)
- [5-Fluoro-3-(trifluoromethyl)pyridin-2-yl]methanol (CAS 1638766-99-0)
- Semaglutide Impurity 148 (CAS CATO-C4X-2226148)
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