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- Sat, 24 Dec 2016 05:44:01 EST RKOZdJ0v No.78416
File: 1482576241169.png -(23568B / 23.02KB, 365x619) Thumbnail displayed, click image for full size. lifespan
sorry for the stupid question, chemistry is def my weakest area

a search tells me that PG USP/EP has a shelf life of two years when stored below 40°C (104°F) in closed containers away from sources of ultraviolet (UV) light.
should i only make enough solution to last a couple years? how long can refrigeration extend this?
Walter Bullermit - Sun, 25 Dec 2016 11:46:47 EST Hzvahzwj No.78420 Reply
1482684407733.jpg -(11497B / 11.23KB, 256x192) Thumbnail displayed, click image for full size.
im assuming that youre using food grade proplyglycol

the shelf life is a legal thing. in my country carbonated water has a declared shelf life.
as long as you store the PG in a somewhat airtight bottle away from heat and intense sunlight, itll be fine.

but depending on what kind of solution youre talking about it might be a good idea to only make it depending on your on usage. nicotine does oxidize a bit, eventhough that in my experience the slight oxidation improves taste of e cig juice.

refrigeration would extend the time period theoretically if the solution is stored in an air tight bottle. besides the legal bullshit this might give a rough estimate of extrapolated shelf life https://en.wikipedia.org/wiki/Q10_(temperature_coefficient)
but that shit quite often fails in practical application as far as ive seen.
Emma Fanbanks - Sun, 25 Dec 2016 12:53:48 EST G2GUCRy9 No.78421 Reply
Why would you need more than a couple of years worth of any kind of solution?
John Semmerforth - Mon, 26 Dec 2016 04:09:20 EST RKOZdJ0v No.78422 Reply

i'm getting a quantity of a research chemical large enough to outlive its legal status (presumably)
i know i can just... keep them not mixed, but i wanted to know if mixing would make the situation worse or not
David Noblingchene - Thu, 29 Dec 2016 00:56:04 EST Fe+cUsBQ No.78426 Reply
You will not regret keeping your entire stash out of solution. Isn't that enough?

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