... propylene glycol, slightly soluble in most of the non-volatile oil, 1g soluble in 72ML of water, soluble in boiling water ... in the corresponding tar, and can be detected in fenugreek oil and coffee, high-quality tobacco leaf volatiles.Quality standardIt employs ... flavor with aroma synergies. Such as coffee, cocoa, chocolate, nuts, maple syrup, caramel and other food flavors deployment. As a tobacco ...