Having used some Vapage “Classic Tobacco” flavored e-juice, and discovered that something in that flavor (as opposed to Nicotine concentrations, or relative proportions of PG/VG) seems to irritate my lung tissue. Have responded by diluting down the Vapage e-juice by a factor of 5 (minimum) with base Nicotine of two different strengths, in order to arrive at a custom brew in the range of 6 mg/mL( in ~75% PG and 25% VG) for my single-battery rig utilizing one 1.5 Ohm coil (with brief draws at what is realistically around 6 Watts).
I’ve been doing research in the literature that I have found available on-line (viewable and download-able without cost) regarding ingredients known to exist in various “tobacco” type flavorings. Very little specifics found, with one notable exception. This paper (see “Table 2: Detected E-liquid Flavorants” on page 3):
… identifies tri-methyl and/or tetra-methyl pyrazines in three of the five individual “tobacco” flavors assayed.
Evidently, the authors are on a (to me somewhat humorous) kick that certain (highly socially demonized) molecules (might, in their paranoid fantasies, anyway) actually be a likely ingredient in e-juices. Seems a bit hysterical to me - but may be a harbinger of things to come as the FDA and “thought police” launch their snouts into e-Nicotine ? At any rate, the specific e-juice analyses presented in the paper are welcome info.
Was originally on a kick that (perhaps) ethyl-maltol (might) be a possible flavoring ingredient in “tobacco” flavored e-juice - but (at least the analysis provided in the above-referenced paper), it is not mentioned as detected in (any) of the various flavor-types analyzed. This paper has swayed me more towards pyrazines (which are significantly included within the 599 additives to leaf tobacco revealed by tobacco companies). They affect chemo-receptors in the mouth and throat - mitigating the sense of “harshness” from Nicotine.
Links to other papers which include interesting related ingredient information (but not for “tobacco” flavors):
I thought that (without necessarily revealing sensitive critical “process secrets” specifying concentrations) perhaps other readers who post (might) have some further knowledge relative to ingredients contained in various “tobacco” e-flavorings (with Vapage “Classic Tobacco” being my specific area of personal interest).