Isobutanol or isobutyl alcohol is an organic compound with the chemical formula (CH₃)₂CHCH₂OH. It is a branched alcohol that is used as a solvent, an intermediate in the synthesis of other chemicals, and in some cases as a fuel.

Physical and chemical properties
Appearance: Colorless liquid with a characteristic odor
Solubility: Soluble in water and many organic solvents such as alcohols, ethers, and esters.
Density: Less than water
Boiling point: Relatively low
Flammability: Flammable and its vapors are heavier than air.
Toxicity: Prolonged contact with skin and eyes can cause irritation. Inhalation of its vapors can also be harmful.

Isobutanol applications

Solvent: Used as a solvent in the production of paints, resins, printing inks, and coatings.
Synthetic intermediate: Used to produce isobutyl esters, isobutyl ethers, and other chemical compounds.
Fuel: Used as an additive to gasoline or as an alternative fuel.
Plastics production: Used in the production of some types of plastics.
Pharmaceutical industry: Used as a solvent or intermediate in the production of some drugs.