C₆H₄(CO₂C₂H₅)₂ Clear, colorless, odorless liquid with bitter taste, boiling at 298_C; soluble in alcohols, ketones, esters, and aromatic hydrocarbons, partly soluble in aliphatic solvents; used as a cellulosic solvent, wetting agent, alcohol denaturant, mosquito repellent, and in perfumes.