Home Cosmetic Science Talk Formulating Do these need preservative ?

  • Do these need preservative ?

    Posted by davidw on June 20, 2014 at 4:11 pm

    Not a cosmetic product but was wondering if these 2 items would need a preservative.

    Ethyl Acetate 60%
    Water 7%
    SD Alcohol 6%
    PEG-15 Cocamine 23%
    Misc other items

    Also

    Acetone 89%
    Water 6%
    PEG-15 Cocamine 4%

    Thanks for any advice.

    davidw replied 9 years, 9 months ago 3 Members · 3 Replies
  • 3 Replies
  • bill_toge

    Member
    June 20, 2014 at 6:18 pm

    since acetone and ethyl acetate at those levels are extremely toxic to most microbes, I’d say no

    on the other hand, if it’s manufactured in such a way that the water phase is left standing for a long time before being added to the solvent phase, I’d recommend adding something to protect the water phase

  • vitalys

    Member
    June 21, 2014 at 3:52 am

    DavidW, My company is manufacturing very simmilar formulations for years and we don’t use any preservatives for them. They are pretty useless here.

  • davidw

    Member
    June 26, 2014 at 7:37 am

    Thank you both for your replies, appreciated.

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