What is Propylene Glycol?

Propylene Glycol is a food grade chemical used in a large number of applications as an additive in cosmetic, medicine, and food products.
Propylene glycol is used in many food products as a flavoring carrier. Propylene glycol is non toxic, and is also found in many food products including food coloring’s, flavorings, and snow cones.
Propylene glycol has a slight irritating effect when inhaled. This effect is used to better mimic the irritation caused by inhaling tobacco smoke.