Water soluble.
Very natural Toffee flavor.
*** Note: This flavor contains 'custard' ingredients: Acetoin & Acetylpropionyl.
Ingredients: Natural and Artificial Flavors,Propylene Glycol, Ethyl Alcohol, Water.
The following link explains the frequent questions & concerns involving custard notes.
Perfumers Apprentice Prop 65 Statement
Warning: This product can expose you to Furfuryl alcohol, which is known to the State of California to cause Cancer.