| CAS No. | 20711-99-3 |
| Molecular Formula | C20H13Cl |
| Molecular Weight | 288.77 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
2-Chloro-9,10-dihydro-9,10-[1,2]benzenoanthracene (CAS 20711-99-3), molecular formula C20H13Cl and molecular weight 288.77 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of 2-Chloro-9,10-dihydro-9,10-[1,2]benzenoanthracene (C20H13Cl) is characterized by chlorine substitution, a polycyclic aromatic system. 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. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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.
As a certified reference material (CRM), 2-Chloro-9,10-dihydro-9,10-[1,2]benzenoanthracene meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
| 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.) | 1962 |
| Halogen Content | Cl-containing |