Sodium Benzoate and Gluconolactone as a preservative system

MelcasMelcas Member
edited May 2020 in Formulating
hello all! I was just about burnt out trying to find a preservative that I feel comfortable using until I found a listing on a website selling a mixture of sodium benzoate and gluconolactone as a broad spectrum preservative system for lotions. Would this be acceptable as a broad spectrum preservative? my ingredients:
-distilled water/tea/hydrosol
-Sodium benzoate & gluconolactone?^
-montanov 202
-unrefined Shea butter
-jojoba oil
-argan oil
-squalane oil 
-arrowroot powder
-possibly xanthan gum if I screw up the consistency and make it too watery

My original recipe didn't include water but I found that the consistency was still too thick and balmy because I wanted a lot of arrowroot powder so it would leave me almost completely matte. I am hoping to homogenize the oil and water mixture using an immersive blender (please let me know if this will do the trick) and montanov 202. Please let me know if you see any red flags here and thanks for the help!!


  • MelcasMelcas Member
    my bad I guess it automatically put me in the "change my view category" this should really be in the formulating one
  • PharmaPharma Member, Pharmacist
    Benzoate plus an acid/sequestrant is not a broad spectrum preservative.
  • MelcasMelcas Member
    @Pharma well shoot lol I really thought I was onto something :( ill keep searching
  • You may want to post actual percentages for your lotion @Melcas so somebody can help with your question about using the stick blender to incorporate the arrow root powder.

    Curious, what is ROE?

    Sodium Benzoate is normally paired with Potassium Sorbate, and both work best in acidic environments (3.5-4 pH). Higher pH yields only a small percentage of activity and would not be sufficient to preserve your lotion. Since you have a tea and a hydrosol you’ll want some good, proven preservative like Germall Plus or Phenonip.

  • MelcasMelcas Member
    @letsalcido hello thanks for responding! I never actually made up my percentages yet although I'm working on it right now. I actually found that id rather use tapioca starch instead of arrowroot powder since I'm using water and am assuming it should be added to the water phase before mixed with the oils, not sure about that though if you know let me know! Rosemary extract oleoresin is ROE that I would use for antioxidant properties!
Sign In or Register to comment.