• Formulating

  Does propylene glycol prevent parabens from falling out of solution?

  Posted by Gunther on December 20, 2018 at 2:12 am

  Parabens are just too water insoluble
  Methylparaben 0.16%  @ 15 C
  Propylparaben 0.023%  @ 15 C
  http://www.nardev.com/UploadSection/ProdCat-183-1444197164.pdf
  These figures are well below the EU regulations maximum allowed (0.4% and 0.15%)

  Does propylene glycol “cling” to parabens molecules and prevent them from precipitating in water?

  vjay replied 5 years, 11 months ago 3 Members · 2 Replies

  • paraben
  • precipitate
  • propylene glycol
  • solubilization
• 2 Replies

• 

  chemicalmatt

  Member

  December 20, 2018 at 5:06 pm

  Parabens are soluble in propylene glycol and other diols. See Germaben II or other preservative combos using this attribute.

• 

  vjay

  Member

  December 21, 2018 at 11:11 am

  Parabens you need to heat and dissolve in glycerin and in hot condition only you need to add to your  base.

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