A little PG/VG Purity Confusion..

[zoiDman]

Don't have a good answer for the taste difference.
But the thickness difference (viscosity) is probably a small quantity of water absorbed during handling and packaging.
3 to 4% absorbed atmospheric moisture will change viscosity quite a bit.
A low density (weight/volume) may also indicate water content..
I think most vendors just use the advertised viscosity, not their own measurements.

Glycerin can be made from a Varity of Sources. Hence it can have a Varity of Tastes.

Anhydrous means "Without Water"

So when the Label on the CVS Glycerin I use and have linked to say 99.5% Anhydrous it means that there is .5% Water per Unit Volume.

But another Brand may be USP Glycerin 95% Anhydrous. It would be considered to be the Same "Quality" but it would have 5% Water per Unit Volume. So it would be Thinner.

Atmospheric Variation I do not think plays much of a Role in the Viscosity of VG.

 

[zoiDman]

BTW - I believe that if Glycerin was 100% Anhydrous that it would be in Solid Crystalline Form.

But I could be wrong.

 

[TTK]

BTW - I believe that if Glycerin was 100% Anhydrous that it would be in Solid Crystalline Form.

But I could be wrong.

Yep, maybe a suppository

 

[Cyrus Vap]

Well I'm gonna be vaping some "food grade" NOW over the next few days, if I blow a gasket I'll ask me fiance' to post for me

 

[Rocketman]

Glycerin is hygroscopic. It will absorb water from the atmosphere. Totally Wicked sold VG that was prediluted, but any USP labeled ought to have 0.5% or less for 99.5% pure or 0.3% or less if 99.7% pure.
Probably does when it was made/tested. How long it was open in order to fill a bunch of 4 oz bottles may make a difference.
Or course there could be some other unexplained scientifically sound reason some VG is thinner than others.
Here is a comparison of VG and PG viscosity at various temperatures. I marked 100% PG @ 20C and 93% VG (6% water) @ 20C. Pretty close to the same viscosity.

http://i965.photobucket.com/albums/ae132/rocketman_photos/PG-VGViscosity.jpg

 

[zoiDman]

Well I'm gonna be vaping some "food grade" NOW over the next few days, if I blow a gasket I'll ask me fiance' to post for me

It should be fine.

But. You might want to dial 9, 1 and then hover your finger over the 1 on your cell phone for the First Couple of Hits.

 

[Rocketman]

put 411 on speed dial so you can call information to get the number to 911

 

[Cyrus Vap]

I will call NOW again tomorrow and see if I get a different response, AND request something in writing to nip this nonsense in the bud lol

In all seriousness, selfish considerations aside, many VG heads use NOW, and we should know what the facts are

 

[Cyrus Vap]

mwa, I miss you

where does one get PnG VG besides ECX and the no longer viable free sample that was ravaged by the vape militia?

 

[zoiDman]

Just to be Clear.

If something isn't USP Verified it doesn't mean that it is Unsafe or Can't be used. It May or May not be. It just means that it isn't USP Verified.

USP Verification Services | U.S. Pharmacopeial Convention

 

[Rocketman]

I will call NOW again tomorrow and see if I get a different response, AND request something in writing to nip this nonsense in the bud lol

In all seriousness, selfish considerations aside, many VG heads use NOW, and we should know what the facts are

I agree.
I have info that is at least a year old from them. Sources change. Current info is best.


either that or call several times and take the average of responses

 

[Rocketman]

Looks like USP hasn't really settled on the purity, and testing requirement for Glycerin.
Call for Candidates: USP Expert Panel on Glycerin | U.S. Pharmacopeial Convention

 

[zoiDman]

Looks like USP hasn't really settled on the purity, and testing requirement for Glycerin.
Call for Candidates: USP Expert Panel on Glycerin | U.S. Pharmacopeial Convention

It may be more that for the First time Ever, vast numbers of people are Vaporizing VG and then Hitting it.

Perhaps up until now, a USP Verification didn't need to consider Chronic Log Term Inhalation.

 

[TTK]

I believe USP and USP Verification are two different things. A bottle labeled USP means that the manufacturer says it meets USP purity. A bottle labeled USP Verified means that USP verifies that it meets USP purity. I don't believe I have ever seen a bottle that says USP Verified.

 

[zoiDman]

I believe USP and USP Verification are two different things. A bottle labeled USP means that the manufacturer says it meets USP purity. A bottle labeled USP Verified means that USP verifies that it meets USP purity. I don't believe I have ever seen a bottle that says USP Verified.

I’m not sure if you can put USP on a Label without it being USP Verified.

But you could be correct. I’m not a Lawyer.


I know that you can Not put UL on something even if it Meets or Exceeds UL Standards Unless you have Registered your Product with UL and gone thru all the UL Paperwork.

 

[TTK]

I’m not sure if you can put USP on a Label without it being USP Verified.

But you could be correct. I’m not a Lawyer.


I know that you can Not put UL on something even if it Meets or Exceeds UL Standards Unless you have Registered your Product with UL and gone thru all the UL Paperwork.

Yes, I believe you can. What I said above was taken from the USP web site. USP has a verification service with a special "verified" Seal.

 

[zoiDman]

Yes, I believe you can. What I said above was taken from the USP web site. USP has a verification service with a special "verified" Seal.

Gotcha...

So what if Anything does USP mean if you see it on a Bottle of Something.

 

[Cyrus Vap]

Man if that's true...LOL...we done been had

 

[zoiDman]

Man if that's true...LOL...we done been had

It does put a New Spin on things Doesn't It?

 

[TTK]

Gotcha...

So what if Anything does USP mean if you see it on a Bottle of Something.

As I originally said, a bottle with USP on it means that the manufacturer says it meets USP purity. With USP Verified on the bottle it means that USP says it meets USP Purity. Never seen that USP Verified seal on anything. But, I have never searched for it.