Is Euxyl K703 a robust preservative system?

Euxyl® K 703 contains:
  • Phenoxyethanol          78.0 - 84.0%
  • Benzoic Acid              11.0 - 13.0%
  • Dehydroacetic Acid     6.5 -   7.5%
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Comments

  • PhilGeisPhilGeis Member, Professional formulator
    Yes - at the right pH and with EDTA or a good chelator
  • 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)?
  • PhilGeisPhilGeis Member, Professional formulator
    It's the single best preservative booster.
  • PaprikPaprik Member
    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. :) 
  • @Paprik you can use caprylhydroxamic acid with cationics if you want. 

    By the way, what not use chelating agent with w/o? 
  • ozgirlozgirl Member, PCF student
    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.

  • PhilGeisPhilGeis Member, Professional formulator
    Caprylhydroxamic acid is not that good as a chelator in preservative context.
  • PhilGeisPhilGeis Member, Professional formulator
    Don;t see much benefit with  DHA when you've Benzoate, esp. in a surfactant context.
  • 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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