Mono Propylene Glycol
Propylene glycol (IUPAC name: propane-1,2-diol) is a viscous, colorless liquid, which is nearly odorless but possesses a faintly sweet taste. Its chemical formula is CH3CH(OH)CH2OH. Containing two alcohol groups, it is classed as a diol. It is miscible with a broad range of solvents, including water, acetone, and chloroform. In general, glycols are non-irritating and have very low volatility
Mono Propylene Glycol is a well-known pharmaceutical excipient that is used for several purposes in a wide range of pharmaceutical dosage forms e.g. as a humectant in topicals (15%), as a preservative in solutions
(15–30%) or as a co-solvent in aerosols (10–25%), parenterals (10–60%), oral solutions (10–25%) and topicals (5–80%). It is also used as plasticiser in aqueous film-coating formulations.