Propylene glycol is a synthetic food additive that belongs to the same chemical group as alcohol.
It is a colorless, odorless, slightly syrupy liquid that is a bit thicker than water. It has practically no taste.
Additionally, it can dissolve some substances better than water and is also good at retaining moisture. This makes it very useful as a food additive, so it can be found in a wide variety of processed foods and drinks.
Other names it is known by include-
☞ 1,2-Propanediol
☞ 1,2-Dihydroxypropane
☞ Methyl ethyl glycol
☞ Trimethyl glycol