• Formulating

  Preservative keeps recrystallising

  Posted by alexis_s on May 6, 2024 at 12:35 am

  Hello everyone,

  I formulated a gel face wash and used Softfeel Eco + Pentylene Glycol as a preservative. However, no matter the pH (I tried 4.7 - 5.9) it keeps recrystallising. I know pH changes it’s solubility and the lower the pH, the less soluble it is but I thought at 5.9 it would work.

  Any idea how to avoid that?

  

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  alexis_s replied 7 months, 2 weeks ago 3 Members · 4 Replies
• 4 Replies

• 

  Abdullah

  Member

  May 6, 2024 at 4:26 am

  What is INCI names?

• 

  PhilGeis

  Member

  May 6, 2024 at 5:17 am

  Doubt crystals are hex glycol. It’s used in biotech to crystallize protein and other macromolecules.

  • 

    alexis_s

    Member

    May 6, 2024 at 5:32 am

    The preservative contains Sodium Levulinate and Sodium Anisate, I think it might have to do with them.

  • 

    alexis_s

    Member

    May 6, 2024 at 5:39 am

    Hex glycol from where?

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