1:4 Butanediol

Cas Number


Other Names

Tetramethylene Glycol

The formula



1,4-Butanediol, colloquially known as BD, is the organic compound with the formula HOCH2CH2CH2CH2OH. It is a colorless viscous liquid. It is one of four stable isomers of butanediol.

Physical and Chemical Properties
Physical state and appearance Liquid. (Oily liquid.)
Odor Odorless
Molecular Weight 90.12g/mole
Boiling Point 230°C (446°F)
Melting Point 20.1°C (68.2°F)
Specific Gravity 1 (Water = 1)
Vapor Pressure 0 kPa (@ 20°C)
Vapor Density 3.1 (Air = 1)
Dispersion Properties See solubility in water
Solubility Easily soluble in cold water
1,4 Butanediol assay, Weight% 99.50
Water, Weight ppm 400
Carbonyl as CHO, mgKOH/g 0.30

1. It is used industrially as a solvent and in the manufacture of Polyurethanes

2. It is used as a raw material to produce tetrahydrofuran (THF), polybutylene terephthalate (PBT) resins, gamma-butyrolactone (GBL), polyurethanes

3. It is used in pharmaceuticals