is Propylene Glycol and vegetable glycerine the same everywhere?

Discussion in 'Ask The Veterans' started by Phydeau, Feb 23, 2011.

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  1. Phydeau

    Phydeau Moved On

    Joined:
    Feb 21, 2011
    Location:
    Dallas, Texas, USA
    I've just found a large bottle of concentrated propylene glycol (USP) for humidors at a very low price ... is this usable for mixing juice?

    Likewise for vegetable glycol.

    Are all these equal for dilution?
     
  2. Hoosier

    Hoosier Vaping Master ECF Veteran

    Joined:
    Jan 26, 2010
    Location:
    Indiana
    USP is what you want. The thing that has me confused is "concentrated". It is either PG or VG USP or it is not.

    It's like you said concentrated water. It's either water or it is not, it cannot be concentrated like flavorings or milk fat.
     
  3. Papa Lazarou

    Papa Lazarou Ultra Member ECF Veteran

    Joined:
    Nov 15, 2008
    Location:
    UK
    The "USP" part means pharmaceutical grade, which as Hoosier says is what you want. The PG should be labelled "Propylene Glycol, USP" (or "Propylene Glycol Ph Eur" in Europe for example). Industrial grade PG should be avoided as it's not intended for consumption and I believe it can have levels of undesirable contaminants like DEG (diethylene glycol) in it.

    The VG equivalent will be labelled "Glycerin, USP". You should have a read of this thread - http://www.e-cigarette-forum.com/forum/diy-e-liquid/52669-pg-vg-labeling-purity-please-read.html

    As Hoosier says, I also don't understand the "concentrated" label - it is not possible to concentrate PG.
     
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