Characteristics: colorless, transparent and volatile liquid, with the smell of wine and pungent taste, easy to flow. Easy to absorb moisture from the air, and can be mixed with organic solvents such as water, chloroform and ether. It can form a * * * boiling mixture with water (water content is 4.43%), and the * * * boiling point is 78. 15℃. The relative density (d20 4(20 superscript, 4 subscript) is 0.789. Melting point-1 14. 1℃. The boiling point is 78.5℃. Refractive index (n20d (superscript 20, subscript d) 1.438+0. Flash point (closed cup) 65438 03℃. Flammable. Steam and air can form an explosive mixture with an explosion limit of 3.5%- 18.0% (by volume).

When the ethanol content reaches 99.99%, it is anhydrous ethanol. The density is 0.7893, the boiling point is 78.5℃, the ignition point is 75℃, and the refractive index is 1.36 1 1. Its preparation method comprises adding lime to alcohol to remove water, distilling, or adding benzene to boil to remove water, and then fractionating.