9-(4-Chlorobenzylidene)-9H-fluorene CAS 1229-71-6
| CAS No. | 1229-71-6 |
| Molecular Formula | C20H13Cl |
| Molecular Weight | 288.77 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
9-(4-Chlorobenzylidene)-9H-fluorene (CAS 1229-71-6) is a high-purity analytical reference standard with the molecular formula C20H13Cl and a molecular weight of 288.77 g/mol.
Based on its molecular formula C20H13Cl, 9-(4-Chlorobenzylidene)-9H-fluorene contains chlorine substitution, a polycyclic aromatic system; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 288.77 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
CATO manufactures 9-(4-Chlorobenzylidene)-9H-fluorene 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 | C20H13Cl |
| Molecular Weight | 288.77 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep tightly closed to prevent evaporation |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Halogen Content | Cl-containing |
Related Chlorobenzylidene Standards
- N'-(2-Chlorobenzylidene)-3-isopropyl-1H-pyrazole-5-carbohydrazide (CAS 303106-35-6)
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- 2-(4-Chlorobenzylidene)-6-methoxybenzofuran-3(2H)-one (CAS 87931-11-1)
- N-(2-Chlorobenzylidene)-4-methylbenzenesulfonamide (CAS 150552-84-4)
- N-(4-Chlorobenzylidene)-4-methylbenzenesulfonamide (CAS 3157-65-1)
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- Semaglutide impurity 83 (CAS CATO-C4X-222683)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
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