• Formulating

  Any help with Glyceryl Stearate (and) PEG-100 Stearate

  Posted by Robert on January 27, 2025 at 2:55 am

  What is the usual percentage of oils when i use Glyceryl Stearate (and) PEG-100 Stearate in a spray lotion, should I consider non-polar oils more, I will not use any other stabilizer except xanthan gum for your reference…
  Purpose of this lotion is cost effective Basic body Lotion to be used with any active for multiple products,

  • This discussion was modified 2 days, 20 hours ago by  Robert.
  • This discussion was modified 2 days, 20 hours ago by  Robert.

  ketchito replied 18 hours, 34 minutes ago 3 Members · 8 Replies

  • #formulation
  • Cosmetic raw materials
  • lotion
• 8 Replies

• 

  Abdullah

  Member

  January 27, 2025 at 4:34 am

  It depends on how much oil do you like. Start from 10%.

  • 

    Robert

    Member

    January 27, 2025 at 4:53 am

    as a general formula I have no specific percentage of oils, so If i start with 10% oils should I add 3% of the emulsifier? should I consider non-polar oils more?
    Usually I do not calculate HLP and I do an empirical emulsifier percentages in my formulas

    • 

      Abdullah

      Member

      January 27, 2025 at 5:15 am

      They don’t matter that much.

      More emulsifier and more oil will give higher viscosity.

      Start with 10% oil+ 3% emulsifier and see if you like it.

      • 

        Robert

        Member

        January 27, 2025 at 6:03 am

        what if the emulsifier was more than enough in lotion is this can affect performance or stability?

        • 

          Abdullah

          Member

          January 27, 2025 at 10:14 pm

          No

• 

  ketchito

  Member

  January 28, 2025 at 8:02 am

  Having more emulsifier than needed is why the whole cosmetic emulsions are all about (you just need to make the calculations). Now, that’s actually good since the excess emulsifier makes the emulsion interface thicker and more stable. So, the high viscosity and better stability is actually due to the excess emulsifier (plus structuring agents, of course). What would be more interesting to know is how much is too much emulsifier. What’s your ratio of emulsifier to structuring agents (like fatty alcohols, glyceryl stearate, etc.)?

  • 

    Robert

    Member

    January 29, 2025 at 2:54 am

    Actually I have not add any structuring agents here because the product is emulsion spray so I need low viscosity emulsion but stable. I thought high emulsifier will dehydrate skin more and may affect skin oils,

• 

  ketchito

  Member

  January 29, 2025 at 5:10 am

  In Glyceryl Stearate (and) PEG-100 Stearate, glyceryl stearate is a structuring agent and PEG-100 stearate is the emulsifier. Can you mention how much of emulsifier you are using or cosider as being too much? Keep in mind that when applied on the skin, it’s not the emulsifier alone that deposits but as being part of a structure.

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