• Formulating

  stearic acid

  Posted by ltruong on June 6, 2017 at 2:55 pm

  Hi all,
  I am trying to formulate this cream base.

  Sorbitan Stearate  1.37
  Polysorbate 80      3.63
  Stearic Acid           5
  IPM                        4
  Glycerin                 2
  D-panthenol          2
  Aloe Vera gel extract  2
  Soybean oil              1
  Dimethicone            1
  Menthol                     0.05
  Phenoxyethanol        0.5
  Frangrance               0.05
  Water                    77.5
  My question are
  1. I use Stearic acid up to 5% but I am getting a lotion not a cream. I don’t have this problem with cetyl alcohol at 5%.  Am I missing anything?
  2. is the formula well constructed in your opinion?

  thanks

  MarkBroussard replied 7 years, 8 months ago 2 Members · 1 Reply
• 1 Reply

• 

  MarkBroussard

  Professional Chemist / Formulator

  June 6, 2017 at 4:29 pm

  Yes, you need to add either NaOH or KOH to bring the pH up to neutralize the Stearic Acid for it to thicken.

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