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Home Cosmetic Science Talk Formulating How to check if this emulsion is o/w or w/o?

  • How to check if this emulsion is o/w or w/o?

    Posted by Abdullah on February 23, 2021 at 1:36 pm

    I did purchase a 25kg bag of glyceryl Stearate from India. Under the name Glyceryl stearate there is written o/w. 
    Now i am not sure if it is GMS or GMS se. As i have purchased it from a trader he aslo have no idea about what these things mean. I have made this cream sample from it and it is thick and stable for two days now.

    How can i check if this cream is o/w or w/o?

    Ingredients of cream
    Petrolatum    %5
    Sesame oil    %1
    Beeswax       %1

    ngarayeva001 replied 2 years, 3 months ago 2 Members · 6 Replies
  • 6 Replies
  • Abdullah

    February 24, 2021 at 4:52 am

    I did add t table spoon of this cream in room temperature water and mixed. This is the result

  • ngarayeva001

    February 24, 2021 at 9:08 pm

    GMS shouldn’t create an emulsion at all, so it migh be SE. But w/o or o/w consideration isn’t relevant.

  • Abdullah

    February 25, 2021 at 1:42 am

    @ngarayeva001 i saw water separation on 3rd day. The cream is not stable. 

  • ngarayeva001

    February 26, 2021 at 8:07 am

    SE would hold it.. have you checked the ph? Even if it’s just GMS it’s still a useable ingredient. You need to pair it up with a proper emulsifier. Ceteareth-20 is a good option.

  • Abdullah

    February 26, 2021 at 3:19 pm

    @ngarayeva001 pH is around 5.5

    At what pH range GMS se would be stable? Evonik says 6.8-8.2

  • ngarayeva001

    February 26, 2021 at 7:40 pm

    I tried at 7.2 and it worked, so your range sounds right.