2-Chloro-9,10-dihydro-9,10-[1,2]benzenoanthracene CAS 20711-99-3

Purity 97%+In StockPharmaceutical Standards
CAS No.20711-99-3
Molecular FormulaC20H13Cl
Molecular Weight288.77 g/mol
CategoryPharmaceutical Standards / API Standards
AvailabilityIn Stock

Chemical Structure

2-Chloro-9,10-dihydro-9,10-[1,2]benzenoanthracene CAS 20711-99-3 chemical structure

Description

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.

Physical & Chemical Properties

Molecular FormulaC20H13Cl
Molecular Weight288.77 g/mol
AppearancePale yellow to yellow crystalline powder. (slight halide-like odor)
Purity97%+
StorageStore at 2-8°C, protect from light, keep tightly closed to prevent evaporation
Solubility (reference)Soluble in chloroform, dichloromethane, ethyl acetate
StabilityMay oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light
Degree of Unsaturation (DBE)14.0
UV AbsorptionUV-absorbing
Structural FeaturesAromatic ring present
CAS Registry Year (est.)1962
Halogen ContentCl-containing

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