What is Propylene Glycol?
Propylene Glycol. Also, called PG, is an organic diol (di-alcohol) compound that has the chemical formula C3H8O2 and the IUPAC name Propane-1,2-diol.
Only one oxygen atom lesser than glycerol as a chemical formula. While in fact, it has only 2 hydroxyl groups compared to 3 hydroxyl groups in glycerol.
PG is a water soluble, colorless, odorless, and viscous liquid. It has a contradictory mix between sweetness and bitterness in taste.
Compared to vegetable glycerin, the viscosity of PG is lesser, and is a main component of the e-liquid products. It turns into vapor when heated to produce a light (less thick) vapor with a bit harsher throat hit to the user. Propylene Glycol is more potent flavor carrier than glycerol.