Home Cosmetic Science Talk Formulating Solubilising Preservatives?

  • Solubilising Preservatives?

    Posted by Formulator on July 18, 2022 at 6:42 am

    Hi all,
    I’m currently reworking a formulation that has preservatives solubilised with a surfactant. I ascribe to a school of thought that preservatives should remain as much as possible in the water phase, where the microorganisms will proliferate. The original formulation has passed challenge testing. However, I wonder how effective preservatives are if they are solubilised within micelles.

    Any input is welcome.
    Abdullah replied 1 year, 12 months ago 4 Members · 3 Replies
  • 3 Replies
  • PhilGeis

    Member
    July 18, 2022 at 10:54 am

    Your point is a sound one and prob the effective basis for neutralizers (Lecithin and Tween) used in recovery media.

  • ketchito

    Member
    July 18, 2022 at 1:10 pm

    @Formulator That’s why preservatives that can be solubilized/emulsified by highly ethoxylated non ionic surfactants, are better added in an emulsion, during the cool down phase.

  • Abdullah

    Member
    July 19, 2022 at 6:44 am

    What is the preservative and surfactant?

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