hxxp://www[dot]advance-scientific[dot]net/Results.asp?Catalog=nicotine&source=general
So what is the difference or what is actually used in the liquids?
The main difference is that our vapejuice is 0-3.6% nicotine in propyl glycol (or some in glycerine,) and water, whereas the first entry on that list is 40% in water (strong enough to be very dangerous - it's very poisonous in concentrations like that, and easy to overdose!)
The propyl glycol/glycerine makes the mist (same principle as a fog machine.)
The only other ingredients are food-grade flavourings.
Also I would imagine our nicotine is a mix of salts - sulphate, tartrate, citric, probably some others, since it's extracted from
tobacco leaves. There's not a lot of freebase (pure) nicotine in
vape juice because of its pH, but the salts still deliver.