Phenoxyethanol Paraben blend

1. Which Paraben in combination with phenoxyethanol has best preservative effect specially for Shampoo?

2. At what percentage can methylparaben and ethylparaben be solubilized in phenoxyethanol?

3. Is there any incompatibility between parabens and SLES or APG?

4. What percentage of phenoxyethanol/Paraben blend is enough to protect this Shampoo formula?

Water, SLES, CAPB, APG, Glycol distearate, guar gum, polyquaternium 10, EDTA, lavender essential oil. 

Comments

  • AbdullahAbdullah Member
    @PhilGeis thanks 
    Unfortunately this blend isn't available here. I have phenoxyethanol in stock as the MOQ of each Paraben is 25kg i can only afford to purchase one of them right now to use with phenoxyethanol. 

    So any suggestion about which one to purchase! 
  • PhilGeisPhilGeis Member, Professional formulator
    Shampoo - then methyl parabens.  But I'm not offering that it will be effective.  This you must determine.
  • AbdullahAbdullah Member
    @PhilGeis may i ask why you are not offering that it will be effective?

    Also what ratio of phenoxyethanol and methylparaben do you recommend? 
  • ngarayeva001ngarayeva001 Member
    edited May 16
    It has never came to my mind to use phenonip in shampoo. Probably because most of surfactant products I make are cold process. No one stops me from heating it though. I  will try this!
  • PhilGeisPhilGeis Member, Professional formulator
    edited May 16
    Abdullah said:
    @PhilGeis may i ask why you are not offering that it will be effective?

    Also what ratio of phenoxyethanol and methylparaben do you recommend? 
    Efficacy can not be presumed.  One must demonstrate by challenge testing. I'm not recommending the stuff - my answer was in response.  If one must use a paraben in a shampoo, use methyl.
  • AbdullahAbdullah Member
    @PhilGeis got it.
    Wht Paraben do you recommend is Lotion and cream in combination with phenoxyethanol and hydroxyacetophenone? 
  • PhilGeisPhilGeis Member, Professional formulator
    Methyl and propyl is a classic combination - with EDTA and a preservative targeting Gram negative bacteria,
  • AbdullahAbdullah Member
    edited May 20
    @PhilGeist thanks
    At what ratio methyl to propyl? 
  • PhilGeisPhilGeis Member, Professional formulator
    2:1 - often 2000/1000 ppm.
  • AbdullahAbdullah Member
    @PhilGeis thanks
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