n-Butanol or n-butyl alcohol or normal butanol is a primary alcohol with a 4-carbon structure and the chemical formula C4H9OH. Its isomers include isobutanol, 2-butanol, and tert-butanol. Butanol is one of the group of "fusel alcohols" (from the German for "bad liquor"), which have more than two carbon atoms and have significant solubility in water.n-Butanol occurs naturally as a minor product of the fermentation of sugars and other carbohydrates, and is present in many foods and beverages. N-Butyl Alcohol Liquid DG is a colorless, flammable liquid with a mild, sweet odor. It is commonly used as a solvent in the production of lacquers, varnishes, and other coatings. It is also used as a chemical intermediate in the production of butyl acrylate, butyl acetate, and other chemicals. Additionally, it is used as a solvent in the manufacturing of pharmaceuticals, perfumes, and flavorings. Its high solvency power and low toxicity make it a popular choice in various industrial applications.