Alfacalcidol Impurity 24 CAS CATO-C4X-139324
| CAS No. | CATO-C4X-139324 |
| Molecular Formula | C27H43ClO |
| Molecular Weight | 419.08 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Alfacalcidol Impurity 24 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.
CATO supplies Alfacalcidol Impurity 24 (CAS CATO-C4X-139324), a pharmacopoeial impurity reference standard (molecular formula C27H43ClO, MW 419.08 g/mol) used for the identification and quantification of trace impurities in APIs.
Alfacalcidol Impurity 24 (C27H43ClO) contains a steroid core, a hydroxyl group, an ether linkage, chlorine 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. 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 | C27H43ClO |
| Molecular Weight | 419.08 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| 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) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | Cl-containing |
Related Alfacalcidol Standards
- Alfacalcidol Impurity 26 (CAS CATO-C4X-139326)
- Alfacalcidol impurity 10 (CAS 174176-73-9)
- Alfacalcidol impurity 17 (CAS 2227309-93-3)
- Alfacalcidol-d7 (CAS 41294-56-8 (non-d))
- Alfacalcidol-d6 (CAS 1641940-94-4)
- Alfacalcidol (CAS 41294-56-8)
- Alfacalcidol EP Impurity A (CAS 65445-14-9)
- Alfacalcidol impurity 13 (CAS 58028-00-5)
Recommended Standards
- Naproxen Impurity 48 (CAS CATO-C4X-170848)
- (2Z)-1-(2,4-Dichlorophenyl)-3-[(5-iodopyridin-2-yl)amino]prop-2-en-1-one (CAS 338401-08-4)
- 5,5′′-Bis(bromomethyl)-2,2′:6′,2′′-terpyridine (CAS 183187-82-8)
- 7-Chloro-3-(methoxymethoxy)-8-((triisopropylsilyl)ethynyl)naphthalen-1-ol (CAS 2771460-18-3)
- Donepezil EP impurity E (CAS CATO-C4X-103936)
- Pantoprazole Impurity 68 (CAS CATO-C4X-139968)
- Landiolol Impurity 29 (CAS CATO-C4X-262129)
- 3-Iodo-5-methoxypyrazolo[1,5-a]pyrimidine (CAS 1823383-09-0)
- (4-(Trifluoromethoxy)phenyl)zinc bromide, 0.50 M in THF (CAS 2097808-42-7)
- Methyl 4-cyclobutyl-2,4-dioxobutanoate (CAS 1211509-86-2)
- Venetoclax Impurity 127 (CAS CATO-C4X-2495127)
- 3-(3,3-Dimethylbutoxy)-1H-pyrazole (CAS 2609742-82-5)
- 3-Fluoro-1,5-dioxaspiro[5.5]undec-3-en-2-one (CAS 134878-53-8)
- Semaglutide impurity 37 (CAS CATO-C4X-222637)
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