Home Cosmetic Science Talk Formulating GEOGARD ECT PRESERVATIVE

  • GEOGARD ECT PRESERVATIVE

    Posted by andriannav on September 28, 2022 at 7:33 pm
    hello!
    i change the preservative in my face cream
    know i use geogard ect, but i see that pH is 3,8
    i have to adjust ph with NaOH or sodium acetate??
    PhilGeis replied 1 year, 4 months ago 5 Members · 11 Replies
  • 11 Replies
  • paprik

    Member
    September 28, 2022 at 8:20 pm

    If I understand your question correctly you are asking how to increase final pH in your product? (After adding Geogard ECT the pH dropped?) 

    If so, yes, you can use NaOH (30% solution for example) or other alkaline pH buffer. 

  • PhilGeis

    Member
    September 28, 2022 at 9:15 pm

    what pH do you want to establish?

  • paprik

    Member
    September 28, 2022 at 9:42 pm

    Yeah, good point @PhilGeis. I should have mention to be careful to keep the preservative in its functional pH. 

  • markbroussard

    Member
    September 28, 2022 at 10:21 pm

    @andriannav

    There is absolutely nothing wrong with pH 3.8 with this preservative.  Do you find the for some reason pH 3.8 is too low for your product for some reason?  I would leave well enough alone unless you have some really compelling reason to raise the pH above 3.8

  • abdullah

    Member
    September 29, 2022 at 5:33 am

    If you want to increase ph above 4.5, i would suggest add another anti fungal too or change preservative again. 

  • andriannav

    Member
    September 29, 2022 at 7:35 am
    can i leave the pΗ for face cream at 3.8? Ι think it's better at 5

  • PhilGeis

    Member
    September 29, 2022 at 10:34 am

    Yes you can leave it at 3.8.  But why did you think you needed to increase it and to what pH?

  • andriannav

    Member
    September 30, 2022 at 8:15 am
    i known that the ph of our face skin is 4,5-5,5
    right??
    that’s why i want iti to be ph around 5

  • PhilGeis

    Member
    October 2, 2022 at 9:34 am

    Are you buffered?

  • andriannav

    Member
    October 6, 2022 at 9:01 am
    what do you mean??

  • PhilGeis

    Member
    October 6, 2022 at 11:06 am

    Do ingredients in your formula hold the pH steady or is pH readily adjusted?

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