Yellowish liquid; CHBr₂CHBr₂; sp gr, 2.98 to 3.00; boiling point, 239 to 242 degrees C with decomposition (at 760 mm); also, boiling point, 151 degrees C (at 54 mm); melting point, 0.1 degrees C; and refractive index, 1.638. Used for separating minerals by specific gravity; a solvent for fats, oils, and waxes; a fluid in liquid gases; and a solvent in microscopy.