Home Cosmetic Science Talk Formulating Sodium benzoate vs benzoic acid efficacy

  • PhilGeis

    Member
    April 30, 2021 at 9:43 am

    Other than the lesser concentration of the ion due to the sodium salt, there is effectively no difference - assuming you obtain solution of addition.   It’s a pH driven equilibrium.

  • abdullah

    Member
    April 30, 2021 at 3:17 pm

    @PhilGeis sorry buy i didn’t get your point “assuming you obtain solution of addition”. Can you explain it a bit more! 

  • pharma

    Member
    April 30, 2021 at 4:54 pm

    Once you bring benzoic acid or sodium benzoate into solution and adjust to a given pH, equimolar concentrations of the two will have a virtually identical antimicrobial effect.

  • abdullah

    Member
    May 1, 2021 at 12:26 am

    @Pharma got it thanks

  • PhilGeis

    Member
    May 1, 2021 at 11:21 am

    Benzoic acid solubility can be an issue.  it’s much less soluble in  water than the sodium benzoate.  Other than that, there is no difference.

  • abdullah

    Member
    May 2, 2021 at 12:23 am

    @PhilGeis thanks

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