I found that my local Co-op sells 1 gal bottles of pg for cattle, It says that its USP grade 100% PG. Is this safe for use in e-liquid? Concern being that it is used for cattle.
Question on PG source
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There is a thread where they mentioned only to use pharma or food grade ingredients. Check out the link below
http://www.e-cigarette-forum.com/forum/diy-e-liquid/277267-purity-pg-vg-peg-short-version.html
http://www.e-cigarette-forum.com/forum/diy-e-liquid/277267-purity-pg-vg-peg-short-version.html
If the product is properly labeled as Propylene Glycol USP it is the USA pharmaceutical grade. No words or symbols should appear between the words "Propylen Glycol" and "USP". Packaging of USP products requires a high quality seal under the cap and an expiration date.
The shelf life is 24 months. Buying a container of more PG than you can use in 24 months may not be an economical choice depending on how picky you are about PG.
Dow Chemical is one of the world's largest producers of PG. DOW PuraGuard Propylene Glycol (PG) USP/EP is used for both pharmaceutical and animal feed purposes.
DOW PuraGuard USP/EP (PG USP/EP) | Dow Propylene Glycols
The shelf life is 24 months. Buying a container of more PG than you can use in 24 months may not be an economical choice depending on how picky you are about PG.
Dow Chemical is one of the world's largest producers of PG. DOW PuraGuard Propylene Glycol (PG) USP/EP is used for both pharmaceutical and animal feed purposes.
DOW PuraGuard USP/EP (PG USP/EP) | Dow Propylene Glycols
What I don't get is because of the USP rating does that make it Pharma grade or is it just that it meets USP standards for livestock?
That's a good question. USP does set standards for veterinary drugs, too. It's cheaper for Dow to produce large quantities of single grade PG that meets many purposes instead of producing several various grades.
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The only thing that matters are the words Propylene Glycol USP on the label, the seal and the expiration date. But, I'm no expert.
I like things simple. I don't use PG but I use VG. I buy it in the drug store as Glycerin USP and don't worry about it.
I like things simple. I don't use PG but I use VG. I buy it in the drug store as Glycerin USP and don't worry about it.
I'm guessing so. Say Dow for example makes the Propylene Glycol USP and sells it the Pretty Pony Company for Pretty Pony brand horse feed PG. If it says Propylene Glycol USP on the Pretty Pony label then it meets the highest standards and can be used for pharma, food and feed purposes. Food grade (FCC) can't be substituted for USP.
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I buy and use it from Tractor Supply and it is also in the cattle feed medicine section. It's fine...no worries.
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