Propylene Glycol

A colourless, nearly odorless, clear, viscous liquid with a faintly sweet taste, hygroscopic and miscible with water, acetone, and chloroform.


Used as chemical feedstock for the production of unsaturated polyester resins. Used as an humectant (E1520), solvent, and preservative in food and for tobacco products, as well as being one of the major ingredients of the e-liquid used in electronic cigarettes. Propylene glycol is able to lower the freezing point of water, and so it is used as aircraft de-icing fluid.

Also known as
Propane-1,2-diol, Propylene glycol; a-Propylene glycol; 1,2-Propanediol; 1,2-Dihydroxypropane; Methyl ethyl glycol (MEG); Methylethylene glycol.

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Atomic / Molecular Weight 76.09 gmol-1Clip
Density 1036 kgm-3Clip
Melting Point 214 KClip
Boiling Point 461.3 KClip
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Subjects: Chemistry