• Formulating

  Advice preservative blend

  Posted by Nyatou on March 2, 2024 at 6:34 am

  Hi,

  I usually buy preservative k (=euxyl k 700) which is not cheap and it´s not always in stock. I do have the ingredients at home so I was thinking about doing the blend myself. I would appreciate some feedback.

  What do you guys think of a blend of:

  0,3% phenoxy

  0,3% benzyl alcohol

  0,2 % potassium sorbate

  0,2% tocopherol

  plus 0,1% edta.

  Nyatou replied 1 month, 3 weeks ago 3 Members · 4 Replies
• 4 Replies

• 

  PhilGeis

  Member

  March 2, 2024 at 7:27 am

  Good idea - but do not “blend”. Formulate as individual ingredients and, if pH allows, use Na benzoate rather than sorbate. Doubt you really need the tocopherol.

• 

  Nyatou

  Member

  March 2, 2024 at 10:44 am

  Thanks for the help @phil . It means a lot.

• 

  Graillotion

  Member

  March 2, 2024 at 12:19 pm

  Not that I should ever add on to a Dr Phil comment…but two of the ingredients, performance will be very tied to pH…which you did not mention. 🙂

  • 

    Nyatou

    Member

    March 2, 2024 at 12:44 pm

    pH is 5 for a body cream @Graillotion

    Is it ok for sodium benzo?

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