[(Science: chemical) A clear, colourless, viscous liquid used as a humectant and solvent in pharmaceutical preparations. derivative of propylene glycol (1,2-propanediol). They are used as humectants and solvents in pharmaceutical preparations. Pharmacological action: cryoprotective agents, solvents, vehicles.
[1. a solvent for several water-insoluble drugs intended for parenteral administration; an ingredient of hydrophilic ointment; a viscous organic solvent frequently used in pharmaceutical preparations to dissolve drug substances with limited aqueous solubility; used in part for preparing injectable solutions of diazepam, phenytoin, pentobarbital, and other drugs.