• Formulating

  Preservative question

  Posted by Anonymous on May 29, 2019 at 4:10 pm

  does anybody know how much phenoxyethanol should i add to this formula.

  90ml -Rose water 
  1g-vitamin E 
  1g-rosehip oil
  1g -tea tree oil 
  1g-hyaluronic acid
  1g- polysorbate 80
  2g -Mica

  ngarayeva001 replied 6 years, 2 months ago 1 Member · 1 Reply
• 1 Reply

• 

  ngarayeva001

  Member

  May 30, 2019 at 10:25 am

  Hydrosols are bug food. Phenoxyethanol alone will not be sufficient to preserve this formula. It useless against mold and thus isn’t concidered a broad spectrum preservative. You need to reconsider the preservative you want to use.

  Assuming this is tocopherol not tocopheryl acetate, you have too much of Vitamin e. 

  The amount of poly 80 is not enough to emulsify 3% of oils.

  You have too much of tea tree oil. It is a known skin irritant.

  Are you using HA as a rheology modifier or its LMW?

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