Propylene glycol info and misinformation

[deegal]

I've read a ton of MSDS's, technical papers, various studies, and government agency publications on propylene glycol. There is so much information out there on the subject (even on these forums) that there didn't really seem to be one truly consolidated place to go to and read about PG. So I'm curious here...

Off the cuff-who here feels comfortable that they understand what PG is and why it is in e-liquids? Where did you get the info that truly made you comfortable with PG?

From my perspective there seems to be a TON of misinformation on the compound. I've definitely overheard people spouting off the typical attacks against PG that just simply aren't true.

Anyways, I won't be ...... if the mods or y'all redirect and/or reject this thread. I'm just a curious enthusiast!


Sent from my iPhone using Tapatalk

 

[Sarin]

Propylene Glycol is in asthma inhalers - that's good enough for me but to add a bit more to your questions. There has been a lot of discussion recently about the generation of formaldehyde from heating PG to a high temperature - the temps that they are talking about are way higher than a coil could manage. It is used as a solvent to enable injection of drugs such as diazepam and various other "pams" as they are insoluble in water. In the human body it is metabolised to pyruvic acid which which is converted to energy via glucose-metabolism. You CAN suffer PG poisoning but not in the quantities delivered by vaping or consuming, poisoning usually occurs via an intravenous route (direct mainline injecting). It is not deemed toxic:

http://www.chem.unep.ch/irptc/sids/OECDSIDS/57-55-6.pdf

I'm no doctor but i am a chemistry grad and we encounter PG a lot.

 

[lamarrk]

Moved to General E-Liquid Discussion.

 

[deegal]

Awesome stuff! I've resorted to quite a lot of publications by Dow Chemical Company. Unfortunately, as is pretty obvious, most of their information is not on the use of propylene glycol in the way that my use resembles.

I have concluded the same as you, but it took me researching a bit more than just that to be comfortable. It's use for aerosols in medication and sanitizing agents (such as an inhaler), excipients in many OTC medications, and ordinary use in foods and beverages has given me confidence to use PG based flavors.

I've also found Columbia University's MSDS on ethylene glycol useful in logically concluding why propylene glycol is a much safer alternative for use in coolants/antifreeze.

I did not feel confident in explaining the properties of propylene glycol and debunking the stigma around antifreeze until I scoured those types of documents. I know there has to be a decent following of fellow enthusiasts that embark upon similar types of research. Please share your sources!


Sent from my iPhone using Tapatalk

 

[AntC]

Awesome topic, thank you all for the info, been very curious myself. Found myself searching for pg products in the grocery store the other day. I had heard cake mix, so that's where the search began,20 mins later I had to quit readings boxes lol. Wasn't as easy to find as I thought it would be though.

 

[Katya]

ECF Library is an awesome place!

http://www.e-cigarette-forum.com/forum/ecf-library/177551-pg-vg-peg.html