1,3-butylene glycol

1,3-butylene glycol

[¦wən ¦thrē ′byüd·ə‚lēn ′glī‚kȯl] (organic chemistry) HOCH2CH2CH(OH)CH3 A viscous, colorless, hygroscopic liquid; soluble in water and alcohol; used as a solvent, food additive, and flavoring, and for plasticizers and polyurethanes.