Chemically its the same, but its normally 10x the water content, and, its not as pure, with different ingredients.
Once in a rare while i would see the poisonous variety mixed in, in the jugs of fog juice.
The exact breakdown can be gotten, normally, from the place you bought it, or from the manufacturer. Here in the US they SHOULD have Haz.Mat. sheets on file inorder to sell it.
The manufacturers normally will post it on their sites as well.
Like with Ecigs, the cheaper the fluid, the worse it used to be.
Also, It always had a Raidiator Fluid taste to it, which by it self isnt bad, because the "Green" stuff is made from a form of PG or VG, but, it BURNED like acid on the tounge which means it MAY have had PEG mixed in.
In the past i found makes that when you looked was basicly Raidiator fluid.
If it is the bad kind, it will burn the eyes, and have a REAL bad burnt smell, like someone BarBQed Stink Weed. Or (hard to put into words) Burnt Cloriphorm? Burnt Green? you get the idea.
Bottom line, Do Not Trust Fog Juice For E-cig Liquid, unless you know FOR SURE where it came from, and whats in it.
I bought, used, and made Hundreds of Gallons of the stuff in my career in Clubs.
If you bought it for halloween, its probably Garbage.
Oh,just thought, if it says do NOT induce vomiting on the lable, its battery acid.