Sea Salt Spray

Hello everyone -

I was looking to make a simple Sea salt spray and had some questions i hope the more experienced community can help with!

Understand sea salt spray usually consists of water+epsom salt+carrier oils+essential oils. 

But i am seeing ingredient lists of products in the market consisting of preservatives and emulsifiers like polysorbate 20 and PEG40 hydrogenated castor oil.

Questions:
1) Are they adding the emulsifiers so that upon application, the user would not have to shake the bottle?
2) given the 4 ingredient mixture above, would a preservative even be necessary? if so, why? wouldnt the salt change the PH level enough so that the solution doesnt require a preservative?

Thanks so much in advance all!
Rick

Comments

  • EVchemEVchem Member
    1) Yeah emulsifiers are there to help the essential oils stay distributed throughout product.

    2) yes- epsom salt won't affect pH enough to put in in a low-risk scenario. And for a fun read, this paper shows that bacterial growth can occur even with high amounts of magnesium sulfate (as we would find on mars)
  • RickSRickS Member
    Thanks so much for the response!

    In general if i add enough salt to water ratio, would it possibly be able to act as a preservative?

    Can epsom salt even act as a preservative? Or is sea salt better?

    Thanks again!
    Rick
  • alchemist01alchemist01 Member
    edited March 20
    Microbes can grow in salt solutions approaching saturation. I have no idea how much salt you're adding but I would use a traditional preservative.
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