Home Cosmetic Science Talk Formulating Dewy Skin Mist Preservative Question

  • Dewy Skin Mist Preservative Question

    Posted by Anonymous on August 4, 2020 at 7:35 pm

    Hey Everyone!

    I need to get a preservative for the below formula and was hoping that I could get some advice to what would be appropriate. 

    The ingredient with asterisks is something that comes with it’s own preservative as you can see from the Gluconolacctone and Sodium Benzoate.
    I was told that I would need to use a preservative for any additional water based products.  

    Can someone please school me on what preservative would work?

    Thank you so much!!
    S

    Water 

    Rose Hydrosol 

    Propanediol 

    Squalane Oil 

    **Vegetable Glycerin (and) Water (and) Zizyphus jujuba (Jujube) Fruit Extract (and) Macrocystis pyrifera (Sea Kelp) Extract (and) Yeast Extract (and) Chondrus crispus (Carrageenan/Irish Moss) Extract (and) Porphyra umbilicalis (Nori) Extract (and) Gluconolactone (and) Sodium Benzoate

    Water (and) Prunus amygdalus Dulcis (Sweet Almond) Seed Extract

    Hyaluronic Acid 

    EVchem replied 3 years, 6 months ago 1 Member · 1 Reply
  • 1 Reply
  • EVchem

    Member
    August 5, 2020 at 1:38 pm

    You’ve got plenty of options, probably best to get a blend to start that offers broad-spectrum coverage (yeast and mold as well as bacteria). 
     If  you can test pH reliably (not pH strips) and keep your product below pH 5.5, then you can use  additional sodium benzoate, potassium sorbate. Otherwise stick with something like phenonip or germaben

    If you do not add an emulsifier your squalane will sit separate from your water phase.

Log in to reply.