Home Cosmetic Science Talk General Is dipropylene glycol considered “bug food”?

  • abdullah

    June 29, 2023 at 11:48 am

    At very low quantity it may act as bug food.

    • DeedeeUkulele

      June 29, 2023 at 9:11 pm

      Would a 10% blend of glycols be sufficient to lower water activity?

      • abdullah

        June 29, 2023 at 9:39 pm

        It will lower it a little bit.

  • Paprik

    June 29, 2023 at 1:42 pm

    PLEASE .. use a proper preservative. Especially in your “green tea based” product. This sounds delicious to me, .. imagine to bugs 😀

    Use chelating agent if possible, use some strong well-known preservative and support it with other ingredient, keep pH as low as possible.

    Almost every ingredient can act as a bug food in low inputs.

    • DeedeeUkulele

      June 29, 2023 at 9:10 pm

      Of course 🙂 This is my planned preservation system:

      0.2% tetrasodium EDTA

      5% propanediol

      1% Nipaguard EHP (phenoxyethanol, ethylhexylglycerin)

      0.7 Gluconolactone

      0.5% sodium benzoate

      pH 4.5

      Admittedly, this cleanser is pretty bug-friendly (green tea water, aloe vera juice, plant extract), so any suggestions/comments are welcome! Also, as much as I’d like to just use 0.5% Germall and call it a day, I’d like to avoid formaldehyde-releasers for the label appeal.

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