Shelf life of unmixed pg/vg base & nic base

[Rossum]

alien Traveler" data-source="post: 17102795" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch">

I have already described 20 years old glycerin, but let me repeat it.
I have in my lab 20 year old 0.5 L clear bottle of glycerin. It was opened 20 years ago. Was opened again and again. Now it is about 0.5 full. Stored on a shelf under bright light (not sunlight). It is of reagent grade (a bit higher than USP), but I would not try to vape it. For example reagent style alcohol (200 proof) is much worse in taste than cheap vodka - it was just cleaned out of different type of impurities. OK, back to glycerin. It is still clear, no odor, may be (just may be) a little bit more sticky than fresh one (I use it only as a hand lotion, when skin is too dry).
I do not recommend to save VG for 20 years, I just wanted to say its shelf life should be quite long. And in a freezer, with nic, it should be really long, longer than that of nicotine anyway.

If you were desperate and had no other source of glycerin, would you vape it?

 

[mhertz]

Yeah, one of my pg/vg suppliers which manufacturers it themselves, told me the date of 2 and 1.5 years of pg/vg are "retest" dates, just meaning that if they have any left, they will re-test it again before that date and if it still holds up to spec(EP/USP), as it should, then the "retest" dates are renewed 1.5 to 2 years again etc.

Btw, for nicbases, then alchem lists the longest retest dates i've seen yet on there own 100mg and 72mg nic-dilutions(and pure nic), with a retest date of 5 years, but that is also listed as dark and cold etc... They also use the wording retest-date instead of shelf-life/best-before...

 

[Capt.shay]

If you get the lower grades of VG they have more water in them and some freeze at well above 0 F.
The more water is some might be why some people complain more about popping in their attys? And more issues with leaking and condensation?

What "grade" of VG could you possibly buy that would have so much water in it that it would act this way?

Science people!


Glycerol Freezing Point
Percent Glycerol (wt. %) Freezing Point (°F / °C)
0 32 / 0
10 29.1 / -1.6
20 23.4 / -4.8
30 4.9 / -9.5
40 -4.3 / -15.4
50 -7.4 / -21.9
60 -28.5 / -33.6
70 -36 / -37.8
80 -2.3 / -19.1
90 -29.1 / -1.6
100 -62.6 / 17.0

 

[Alien Traveler]

If you were desperate and had no other source of glycerin, would you vape it?

I doubt it. But from the other hand I have not been in a such desperate occasion yet...

 

[Robert Cromwell]

What "grade" of VG could you possibly buy that would have so much water in it that it would act this way?

Science people!


Glycerol Freezing Point
Percent Glycerol (wt. %) Freezing Point (°F / °C)
0 32 / 0
10 29.1 / -1.6
20 23.4 / -4.8
30 4.9 / -9.5
40 -4.3 / -15.4
50 -7.4 / -21.9
60 -28.5 / -33.6
70 -36 / -37.8
80 -2.3 / -19.1
90 -29.1 / -1.6
100 -62.6 / 17.0

The same chart I used. 30% freezes at 4.9 deg F.