Quality Standards:relative density (relative to water, at 20℃): 690 to 700 kg/m3; distillation range: 30 to 205, benzene: 0; sulfur content: not more than 10ppm; octane value: not less than 94; methanol: 0; not containing olefin and arene; passing Dr. experiment; copper corrosion: Grade 1. Property and Purpose: soluble in benzene, toluene, xylene, chloroform, diethyl ether, carbon disulfide, carbon tetrachloride, dimethylformamide and oils excluding degradable castor oil; slightly soluble in ethanol; practically insoluble in water; flammable, irritating and volatile, organically synthetic; solvent; to test the octane value of fuel oil by mixing with n-heptane; gas chromatography analysis meeting the standards; diluent.