Home Cosmetic Science Talk Formulating General Is Euxyl K703 a robust preservative system?

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  • Is Euxyl K703 a robust preservative system?

    Posted by DaveStone on August 8, 2021 at 2:49 am
    Euxyl® K 703 contains:

    • Phenoxyethanol          78.0 - 84.0%
    • Benzoic Acid              11.0 - 13.0%
    • Dehydroacetic Acid     6.5 -   7.5%
    Abdullah replied 2 years, 10 months ago 5 Members · 9 Replies
  • 9 Replies
  • PhilGeis

    Member
    August 8, 2021 at 10:41 am

    Yes - at the right pH and with EDTA or a good chelator

  • DaveStone

    Member
    August 9, 2021 at 1:34 am

    PhilGeis said:

    Yes - at the right pH and with EDTA or a good chelator

    Is a chelator usually needed, even in simple formulas (like a solution of water, glycerin, propanediol, sodium lactate)?

  • PhilGeis

    Member
    August 9, 2021 at 10:11 am

    It’s the single best preservative booster.

  • Paprik

    Member
    August 9, 2021 at 7:06 pm

    I usually use chelator everywhere (except obvious formulas such as cationic system, W/O … ).
    First of all, I have it on hand (plenty of it and such a small amount is used), it’s cheap and it helps preservative and antioxidant. :) 

  • Abdullah

    Member
    August 10, 2021 at 2:14 am

    @Paprik you can use caprylhydroxamic acid with cationics if you want. 

    By the way, what not use chelating agent with w/o? 

  • ozgirl

    Member
    August 10, 2021 at 2:36 am
    We have had success with Euxyl K701 (Phenoxyethanol (and) Benzoic Acid (and) Dehydroacetic Acid (and) Ethylhexylglycerin) which is similar. We use a chelator (GLDA) and keep the pH at around 5.5.

  • PhilGeis

    Member
    August 10, 2021 at 11:10 am

    Caprylhydroxamic acid is not that good as a chelator in preservative context.

  • PhilGeis

    Member
    August 10, 2021 at 1:57 pm

    Don;t see much benefit with  DHA when you’ve Benzoate, esp. in a surfactant context.

  • Abdullah

    Member
    August 11, 2021 at 4:29 am

    PhilGeis said:

    Caprylhydroxamic acid is not that good as a chelator in preservative context.

    Yeah but if if he want at least some chelating agent in cationic system this is the way ????

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