Home Cosmetic Science Talk Formulating pH matters

  • pH matters

    Posted by ozgirl on October 8, 2021 at 3:47 am
    Just wanted to share something interesting.
    Whilst working on a non-cosmetic product I had to test a competitor product that according the SDS and our own analysis was around 8-9% sodium benzoate in a water solution (and not much else). The pH was around 8.
    During the course of testing (after a couple of months) the sample managed to grow a large amount of mould (mold) due to the pH being out of the optimum range for preservation.
    This lovely specimen was removed from the top of the solution. :/
    abdullah replied 2 years, 5 months ago 2 Members · 1 Reply
  • 1 Reply
  • abdullah

    Member
    October 8, 2021 at 6:17 am

    Yeah, if it was pH 4 it would have been better than this even without any preservative 😃

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