Home Cosmetic Science Talk Formulating Best Preservative for Dishwash soap

  • Best Preservative for Dishwash soap

    Posted by nikolatesla23 on July 2, 2020 at 4:40 pm

    Hi everyone!
    I recently made a batch of dishwash soap for my small business. As a preservative, I used Methyl Paraben (1 gram for every liter of dishwash soap, about 0.1%).
    However, the cost of it kills me. Is there a cheaper and alternative preservative that is safe and as effective as Methyl Paraben?
    Also, out of topic, what is the recommended amount of EDTA tetrasodium in dishwash soap ?(in my formulation, its 0.1%. Is this enough?)

    Thank you in advance!

    Farrukh replied 3 years, 11 months ago 3 Members · 3 Replies
  • 3 Replies
  • chemicalmatt

    July 2, 2020 at 9:07 pm

    Isothiazolinones…BIT in the parlance of the HI&I world…at 0.10%. Done. Also, double that EDTA unless you wash dishes in the woods, then triple it.

  • nikolatesla23

    July 3, 2020 at 1:33 pm

    Thank you @chemicalmatt. I’ll check my local suppliers if they sell Isothiazolinones. 

  • Farrukh

    August 1, 2020 at 1:54 pm

    Formaldehyde is a cheap preservative for dish soap

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