Home Cosmetic Science Talk Formulating Food preservatives for Cosmetics

  • Food preservatives for Cosmetics

    Posted by Devansh7 on May 7, 2020 at 12:42 pm

    Hello all.  
    I’ve been working on a cleansing formulation using coco glucoside(0.4%) 
    Humectants ( Propylene Glycol and Glycerol)
    Ph is between 3-4.

    We want to use food preservatives. 
    Would a blend of benzyl alcohol+sodium benzoate + sodium salt of dehydroacetic acid work well for a shelf life of 1+ years?

    What should be an ideal ratio in the blend?

    Chemist77 replied 4 years, 1 month ago 6 Members · 8 Replies
  • 8 Replies
  • OldPerry

    May 7, 2020 at 12:54 pm

    You can try it. Some people have successfully used preservative systems like that. Of course, it also depends on what else is in your formula.

  • Devansh7

    May 7, 2020 at 1:08 pm

    Hello Perry. 
    Here’s the formulation:
    Coco glucoside 0.4g/100g
    Glycerol 4g/100g
    Propylene glycol 1g/100g
    Lactic acid to keep the pH between 3-4
    Aqua : rest.

    should I be sure that benzyl alcohol+ sodium benzoate + sodium salt of dehydroacetic acid would work because time is against my Side..

    Also any source to know what blend would be the best with absolute certainty? 


    May 7, 2020 at 6:48 pm

    ! % Geoguard ultra  a blend of benzoic acid and gluconolactone

  • alchemist01

    May 7, 2020 at 7:11 pm

    Devansh7 said:
    Also any source to know what blend would be the best with absolute certainty? 

    I highly doubt anyone will tell you that, because no one has made your product.

  • Chemist77

    May 21, 2020 at 7:59 am

    Any idea where this product is going to be used, I mean area of use on the body.

  • Pharma

    May 21, 2020 at 10:17 am
    Preserved foods are typically labelled with an expiration date which, depending on packaging (hot fill in sealed jars, canned, or pasteurised), may well be longer than 1 year with that low pH (there’s a huge difference between pH 3 and 4!) and your preservative blend. And then the label reads: Store in fridge after opening and consume within a few days…
    What’s also required if you intend keeping it microbiologically clean for a long time during which consumers put their dirty fingers in it every day is a low water activity. 5% polyols won’t suffice.
    Read recommendations for food preservation.
  • Devansh7

    June 6, 2020 at 12:08 pm

    The area of use would be topic. On female genitalia. 
    Also, a blend of (glycerol + propylene glycol) (4g:1g   in 100ml) solution would be good enough as a humectant?  

  • Chemist77

    June 11, 2020 at 6:50 am

    In food what I generally see is a combination of KSorb/NaBenzoate along with other factors like low water activity, low pH (in ketch and sauses), high sugar content, etc. Again I believe the PET should be done no matter what the area of use is, more so in this case as it is an intimate care product. 

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