I received a 250ml bottle of 48mg VG from Box Elder Chemical Supply.
After drawing a 2ml sample and transferring it to a clear glass vial, I examined it for appearance. It was clear with a faintly yellowish tint.
I sniffed it for odor but really couldn't tell much. There didn't seem to be any solvent smell.
I took a droplet and tasted it. Yep, that's nicotine... I got the familiar peppery burn on the tongue within a few seconds. No actual taste, just the nic sting.
I diluted it to 80% concentration with distilled water, which should have produced a 38mg/ml strength base. I cleaned the primer out of a new EM LR 901 atomizer and put it on an eGo, added the liquid and vaped it to check the taste and effect.
Not much taste to it that I could tell, plenty of vapor as you would expect from VG in an LR atty, moderate throat hit. I dripped and vaped it for about half an hour, by which time I was getting a nic buzz and my ears began ringing slightly (slightly more than usual; I have tinnitus).
I used the remaining small amount of base to make a cinnamon/hazelnut juice which I vaped the next day. No off taste that I could tell.
In conclusion, this particular bottle of unflavored liquid is acceptable to me. It might not be up to the standard of Xtreme Vaping's liquid but it appears to be pure enough and potent enough to serve.
You beat me to it but...
Box Elder Chemical Supply
Ordered 250ml of 100mg PG
Bottle is colored blue plastic chemical supply for UV protection and labels are appropriate for HAZMAT/OSHA purposes.
Coloration is clear with a acceptable tint (slightly yellow) before dillution.
Odor is typical for this level of nicotine which is to say non-existent.
Reduced down to 5mg in 10 ml Solution for this test and mixed with no flavoring. Four drops in a fresh atomizer produced standard vapor at High Voltage (6), High Voltage (5) and Regular Voltage (3.7).
Remaining solution mixed with 1.3ml Flavoring for Perfumer's Apprentice Cinnamon. Solution repels the flavoring until shaken which is standard for this flavoring. After mixture it vaporizes as expected.
I am not able to check for actual purity at nicotine level but I would deem it acceptable for vaping.
Admittedly? Xtreme's liquid seems to be of superior clarity (almost perfectly clear) but for the price you really can't beat Box Elder.