Cosmetic Science Talk

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Home Cosmetic Science Talk Formulating Reverse Formulation

  • PhilGeis

    June 6, 2021 at 10:22 am

    Re. 3.   Real weak system - you need more than that.

  • MarinaReneia

    June 7, 2021 at 3:25 am

    Thank you for betting back to me

    The supplier recommended 1.25% that’s the max I can use.

    That’s why I believe that sodium gluconate acts as a preservative,  but I’m not sure on how to work with this ingredient :( 

    Can you please advice :) 

    Thank you so much 

  • EVchem

    June 7, 2021 at 2:31 pm

    For question 1:
    No I don’t  think you can substitute- the original emulsifier is meant for O/W systems, your substitution is meant for W/O.

    I’ve never used this shop but they have it available here: 
    if you have a connection with an evonik rep:

  • PhilGeis

    June 7, 2021 at 7:17 pm

    Glyceryl’s undecylenate and caprylate with or without gluconate is a lousy system.  any idea pH?

  • MarinaReneia

    June 8, 2021 at 12:01 am

    Hi Folks,

    Thank you again for your reply 

    I’m based in Asia and I contacted before both suppliers before - the shop doesn’t deliver outside of Italy . The supplier just will not reply although I used my business email to try and get their attention. It’d be lovely if someone here can help me to find this ingredient / supplier who has it :) 

    I understand that the preservation system is not strong enough, but it didn’t answer my question on how to use the ingredient - the product is at 3.9pH. When I was formulating I was taking the pH though the process and the base has a pH of 5 after adding the preservative and essential oils it jumped to 6.5pH and that is when I used citric acid and bring it back down to 4pH

    Thank you 


  • PhilGeis

    June 8, 2021 at 9:37 am

    Marina - did the original prroduct have a PAO?

  • MarinaReneia

    June 8, 2021 at 11:45 am

    Hey Phil, 

    Yes it has a 6M PAO

  • Abdullah

    June 8, 2021 at 11:57 am

    Glyceryl Caprylate may not be stable at low pH like 3.9