Propanol is a compound in which one hydrogen atom in the propane molecule is replaced by a hydroxyl group. Since the hydroxyl group can replace the hydrogen on the two ends or the middle carbon atom of the carbon chain, two isomers, n-propanol and isopropanol, can be produced. The chemical properties of n-propanol are similar to those of ethanol. It is a byproduct of the synthesis of methanol from carbon monoxide and hydrogen. At room temperature and pressure, it is a colorless, transparent liquid with a fragrance. In industry, it is prepared from ethylene, carbon monoxide and hydrogen under high pressure and cobalt catalysis, by hydration of propylene under the action of sulfuric acid or by catalytic hydrogenation of acetone, and is generally used as a solvent. It is irritating to the eyes and mucous membranes. Inhalation of propanol vapor can cause dizziness, headache, vomiting, etc.