Propylene glycol is a clear, colorless and hygroscopic liquid. Propylene glycol contains an asymmetrical carbon atom, so it exists in two stereoisomers. The freezing point of water is depressed when mixed with propylene glycol due to increased opportunity for hydrogen bonding. Propylene glycol…

1,2-Propanediol CH₃CH(OH)CH₂OH CAS#: 57-55-6 F.W.: 76.10