• Formulating

  Preservative systems

  Posted by cossci21 on January 29, 2015 at 5:22 am

  Hello
  just a simple question on what is the best broad spectrum preservatives for mists which is 95% water, with bug loving extracts such as aloe vera powder etc?
  Was thinking of using Chloramcetamide? But doesnt sound very nice.
  Cheers

  cossci21 replied 9 years, 11 months ago 4 Members · 6 Replies
• 6 Replies

• 

  crisbaysauli

  Member

  January 29, 2015 at 8:00 am

  I would suggest the usual sodium benzoate/ potassium sorbate when the pH is 4.0-5.0. What exactly is the application of your mist?

• 

  cossci21

  Member

  January 30, 2015 at 5:19 am

  face mist, leave on product.
  how much do you recommend?

  thanks

• 

  crisbaysauli

  Member

  January 30, 2015 at 8:07 am

  Maximum allowable limits for leave on products are:

  Sodium benzoate - 0.5% Potassium sorbate 0.6%. You have to perform a preservative efficacy test to prove the micro stability of your mist.

• 

  OldPerry

  Member

  January 30, 2015 at 4:03 pm

  The best in terms of functionality?  DMDM Hydantoin plus Methylparaben.
• 

  MakingSkincare

  Member

  January 31, 2015 at 10:57 am

  cossci21 those two organic acids will likely not be sufficient and sodium benzoate has failed some patch tests we carried out.  There’s far more to preservation than just adding a preservative. You need a strategy.  Handy checklist and reviews of 27 preservatives here -

  http://www.makingskincare.com/preservatives/

• 

  cossci21

  Member

  February 4, 2015 at 11:18 pm

  Thanks everyone
  aware of pot sorbate and sodium benzoate, pot sorbate is a a irritant and need a low pH to be active so will definitely not use that.
  Aware of parabens an love them but not for our natural clients unfortunately.

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