Cas Number


Other Names

Butalcohol, Butanol, 1-Butanol, Butyl alcohol, Butyl hydrate, Butylic alcohol, Butyralcohol, Butyric alcohol, Butyryl alcohol, n-Butyl alcohol, 1-Hydroxybutane, n-Propylcarbinol

The formula



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.

Physical and Chemical Properties
Physical state and Appearance : Liquid.
Color : Clear Colorless.
Boiling Point : 86.7°C (188.1°F)
Melting Point : -87.1°C (-124.8°F)
Specific Gravity : 1.4649 (Water = 1)
Vapor Pressure : 58 mm of Hg (@ 20°C)
Vapor Density : 4.53 (Air = 1)
Solubility : Easily soluble in methanol, diethyl ether, acetone. Very slightly soluble in cold water.
Density at 20°C, g/cm3 : 0.801--0.803
Mass fraction of isobutyl alcohol, %, min : 99.3
Mass fraction of acids in acetic acid recalculation,%, max : 0.003
Bromine number, g of brome/100 g of alcohol, max : 0.02
Mass fraction of carbonyl compounds in butyric aldehyde recalculation,%, min : 0.03
Mass fraction of non-volatile residue, %, max : 0.0025
Mass fraction of water, %, max : 0.1

Market literature classifies n-butanol as both an oxo-chemical derivative and a plasticizer alcohol for market purposes. The uses of n-butanol vary by geographic area, but in general it is used to make other chemicals, or used as a solvent or an ingredient in formulated products such as cosmetics. A partial list of chemicals in which it is used includes:

1. Acrylate/methacrylate esters

2. Glycol ethers

3. n-Butyl acetate

4. Amino resins

5. n-Butylamines

Applications, chemicals and products that use n-butanol include:

1. Solvents – for paints, coatings, varnishes, resins, gums, dyes, camphor, vegetable oils, fats, waxes, resins, shellac, rubbers and alkaloids

2. Plasticizers – to improve how a plastic material processes

3. Coatings – as a solvent for a variety of applications, such as curable lacquers and cross-linked baking finishes

4. Chemical intermediate or raw material – for producing many other chemicals and plastics, including safety glass, hydraulic fluids and detergent formulations

Textiles – as a swelling agent and manufacturing garments from coated fabric

Flotation agents


Floor polishes

Cosmetics – including eye makeup, foundations, lipsticks, nail care products, personal hygiene products and shaving products

5. Drugs and antibiotics, hormones, and vitamins

6. Gasoline (as an additive) and brake fluid (formulation component)