• Formulating

  Wisps and flakes in an aqueous lotion

  Posted by Dr.Drey on March 25, 2024 at 4:39 pm

  Hi everyone !

  I’m developing an aqueous solution containing 10% of a hydroglycerin plant extract, 10% of denaturared alcohol (0.1% TBA + 10 PPM bitrex), three different hydrolates (5% each), 0.2% of sea salt, mel, potassium sorbate, sodium benzoate, and distilled water.

  At Day 0, the solution is transparent and clear. Six days after manufacture, I observe wisps and flakes at room temperature and obscurity (video attached).

  Have you ever encountered this problem? What could be the cause of these wisps and flakes? How can I remove them?

  I tried solubilizers but the results were inconclusive.

  Thank you in advance for your help.

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  Dr.Drey replied 8 months ago 2 Members · 3 Replies

  • aqueous solution
  • flakes
  • instability
  • plant extract
  • wisps
• 3 Replies

• 

  Dr.Drey

  Member

  March 25, 2024 at 4:51 pm

  Please find attached a photo of flakes visible to the naked eye and a photo of a flake under an optical microscope (x100).

  

  
• 

  Paprik

  Member

  March 25, 2024 at 7:35 pm

  I believe the first question will be what is the final pH?

  • 

    Dr.Drey

    Member

    March 25, 2024 at 11:06 pm

    Thank you for your reply.

    The final pH is 4.8 (spec : 4.5 < pH < 5.0).

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