Home Cosmetic Science Talk Formulating How to use Tetrasodium EDTA?

  • How to use Tetrasodium EDTA?

    Posted by Heath0o7 on April 29, 2024 at 7:48 am

    Hi all,

    I’m familiar with GLDA, but I’ve never used this chelating agent before. I have it in a powder form, and I was wondering how to use it? Do I need to make a 50% solution or can I add it to the water phase as is when formulating?

    Another thing I use some help with please is using parabens. I bought a preservative that has a mixture of phenoxy + ethyl, propyl, butyl and methyl paraben in a solution. I’d imagine this would be effective against YMF, gram + & - bacteria? If so, how to figure out the appropriate usage rate? Supplier says between 0.25% to 1%, but I know they want you to use more to buy more from them


    @PhilGeis @Graillotion

    Fekher replied 1 week, 6 days ago 6 Members · 10 Replies
  • 10 Replies
  • PhilGeis

    Member
    April 29, 2024 at 9:02 am

    Assume you’ve Phenonip or a similar preservation combination. This should be effective.

    • Heath0o7

      Member
      April 30, 2024 at 3:15 pm

      Correct, only mine doesn’t have isobutyl paraben mixed in it.

      • PhilGeis

        Member
        April 30, 2024 at 3:34 pm

        good

  • Abdullah

    Member
    April 30, 2024 at 8:53 pm

    I make a 20% EDTA solution and use that.

    Use the preservative at highest amount allowed

    • Heath0o7

      Member
      May 2, 2024 at 3:31 am

      If I were to use 20% edta solution, what would be the usage rate for it when formulating? Is it 0.2% (0.04% active)?

  • ngarayeva001

    Member
    May 3, 2024 at 4:24 am

    Both disodium and tetrasodium dissolve in water if you heat it. I never bother with preparing solutions and use them as recommended by the supplier depending in the formula.

  • Cafe33

    Member
    May 5, 2024 at 12:49 pm

    Tetrasodium EDTA dissolves readily in water without applying heat. Very easy to use.

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