Ortho‑Dichlorobenzene (CAS No. 95‑50‑1; formula C₆H₄Cl₂; MW 147.0 g/mol) is a colorless to pale-yellow aromatic liquid with a naphthalene-like odor. It has a boiling point near 180 °C, melting point around –17 °C, is sparingly miscible in water, and is widely used as a high-boiling solvent and chemical intermediate.