Butanediol and butanol are two important organic compounds that have a wide range of applications in various industries. Both compounds belong to the family of alcohols and have similar chemical properties. Butanediol is used industrially as a solvent and in the manufacture of some types of plastics, elastic fibers and polyurethanes. In organic chemistry, butanediol is used for the synthesis of γ-butyrolactone (GBL). In the presence of phosphoric acid and high temperature, it dehydrates to the important solvent tetrahydrofuran. Butanediol is also used in the production of polybutylene terephthalate (PBT) plastic. Butanol, on the other hand, has a wide range of applications, including as a solvent, fuel, and intermediate in the production of other chemicals. It is commonly used as a solvent in the production of paints, coatings, and adhesives. Butanol is also used as a fuel additive and in the production of biofuels. In the pharmaceutical industry, butanol is used as a solvent for various drugs and as a component of some medications.