Liquid Soap is cloudy

Unknown Member
edited February 2014 in Formulating
Hi,

I made liquid hand soap with coconut oil, safflower oil, palm kernal oil and potassium hydroxide.  I did 10% additional KOH and then neutralized with boric acid.  I thickened it with sodium chloride and added grapefruit extract for scent.  I sequestered for 2 weeks and now it is cloudy and has a "white cloud" on the bottom that won't mix in.  Is this due to the grapefruit extract?  I have made this same soap and scented with orange essential oil and the soap was clear.  Any suggestions to fix would be great!!

Thanks

Comments

  • BobzchemistBobzchemist Member, PCF student
    It could be microbial contamination. What was the final pH? Have you run a plate count?
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
  • chemicalmattchemicalmatt Member, Professional Chemist
    Compounder, when you lowered the pH, then added salt, you salted out the saponified coconut/palm higher fractions (C18 +).  Leave the pH at 9.0 plus, and don't add salt.  As long as your total solids are less than 25%, you should be OK.  If not, just decant the water off and re-tag it as shaving cream. No problemo!
  • chemicalmatt:
    The pH is currently 9.  I have made several other batches and used salt to thicken it.  I have never had that happen.  Do you think its the grapefruit essential oil cauing the cloudiness?

    Bobzchemist: The pH is currently 9.  I don't think its microbial contamination.
  • It could still be microbial contamination at pH 9 in my opinion.  To quote my Ph.D. advisor Charles Gerba, "Germs never give up, they always find a way!"

    pH 10 or above would be the alkalinity at which I would not anticipate much microbial growth.

    The problem with germs is that they're invisible so it's tough to tell without lab testing.
    For testing help visit us at Cosmetic Test Labs
  • BobzchemistBobzchemist Member, PCF student
    We've seen microbial/fungul growth in our liquid soaps up to pH 11...
    Robert Zonis, Sr. Formulation Chemist, Beaumont Products "All opinions and comments expressed are my own, have no relation to Beaumont Products, are fully copyrighted, and may not be used without written permission."
Sign In or Register to comment.