Home Cosmetic Science Talk Formulating low viscosity in peroxide cream

  • low viscosity in peroxide cream

    Posted by Anonymous on July 6, 2016 at 8:52 pm

    Hi every one:

    I have problems making a peroxide cream, the formula is very simple:

    Lanette SX                                    4.3 p/p%

    60 % hydrogen peroxide              7.62 p/p%

    metal chelator                             0.02 p/p%

    Fragrance                                     0.0038 v/p%

    To make, i mix the lanette with water (metal chelator previously solved) at 65 °C and homogenize  it. Then it’s cooled and at this point everything is right, but when I add the hydrogen peroxide (once the mix is at 25°C) the cream loses viscosity, and becomes completely liquid. I know this formula has been used before with no inconvenients, so it’s really confusing for me.

    my hypothesis are:

    Reaction of peroxide: I dont see any bubbles, so i think it is unlikely.

    Mistakes in procediment: as i said, this method has been used before, why it did not happened then?

    Quality of wax: I dont know if it is possible .

    Any help would be apreciated. Thanks


    Anonymous replied 7 years, 7 months ago 1 Member · 4 Replies
  • 4 Replies
  • bill_toge

    July 6, 2016 at 9:48 pm

    it’s very likely that you’re over-shearing the product when you’re add peroxide; there’s not much wax in the formula, and nothing that will help the viscosity recover quickly once it’s been sheared

  • Anonymous

    July 6, 2016 at 10:42 pm

    thank you Bill. Agitation is gentle when the peroxide is added, and the addition is made carefully at a small rate. Can you recommend me some product to achieve the viscosity recovering you mention? 

  • bill_toge

    July 7, 2016 at 8:23 pm

    try cetearyl alcohol; you’ve already got an emulsifying wax in there so it should mix in easily

    also, I’d suggest using a 35% solution of peroxide rather than a 60%, as it’s safer and easier to handle

  • Anonymous

    July 7, 2016 at 10:49 pm

    ok, I will try it. thanks a lot!

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