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Home Cosmetic Science Talk Formulating Soap Foaming On Serum Issue With Essential Oil

  • Soap Foaming On Serum Issue With Essential Oil

    Posted by Kevt123 on May 10, 2023 at 5:50 am

    Hi everyone, I want to introduce essential oil to my water based gel serum formula. However I face challenge since solubiliser is required. I found out even low dosage of solubiliser can cause soapy foam when rub on hands, which was done in separate small batch with only solubiliser and water. So I thought it was solubiliser issue and try switching different raw mat and even use combination, but soapy-ness still there.

    Then I did another small batch with only essential oil, pentylene glycol and water, the result also give me soapy-ness…

    So now I assume the soapy-ness came from both solubiliser and essential oil? If anyone have experience on this please help because I really want to introduce essential oil, though I have seem some in market samples.

    Note that I can get solubiliser and essential oil ratio, but just the soapy foam thing appear everytime.

    Adamnfineman replied 1 week, 6 days ago 2 Members · 1 Reply
  • 1 Reply
  • Adamnfineman

    May 15, 2023 at 2:31 pm


    What percent of essential oil and solubilizer are you trying to use?

    Have you tried using a mix of Polysorbate 20 and PEG-40 Hydrogenated Castor Oil? We use a ratio of 1:1:1, Polysorbate 20 : PEG-40 Hydrogenated Castor Oil : Oil phase. This gives us a clear product without soaping.