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  • evaluation

    Posted by isra on December 10, 2015 at 7:44 am

    hi all 

    can you please evaluate my formula for heavy duty kitchen degreaser

    RobertG replied 7 years, 1 month ago 5 Members · 10 Replies
  • 10 Replies
    • RobertG

      December 21, 2015 at 4:43 am

      If Stepan has the NaOH listed as “neutralizer”, then I’m guessing it was either their mistake or they had something in there that needed neutralizing that when you modified the formula you left out.  Amine oxide surfactants because they’re made under alkaline conditions tend to come in slightly alkaline IME.  I agree with the others that you don’t have enough NaOH to work as a caustic cleaner, but “too much” for anything else I can see.  Also that if this is for direct application as on a mop or from a spray bottle, to then be wiped off without rinsing, it has too much surfactant.  The limonene looks like too little to be a solvent, too much to be a preservative or perfume, although if it’s the only preservative it may not be enough!

    • ozgirl

      December 13, 2015 at 9:35 pm

      If it is going to be a ready to use then you can use much less surfactant. The Stepan formula is for a concentrated product.

    • Belassi

      December 13, 2015 at 4:24 pm

      @isra: It depends what the NaOH is being used for. At 1.4% it looks far too small an amount to be the active cleaning agent (I’m thinking about oven cleaners which are typically very caustic and the action is basically a saponification reaction converting the baked-on grease into soap). But as a pH adjuster why end up with pH11?

    • isra

      December 13, 2015 at 6:06 am

      thank you all

      it would be sold ready to use product
    • Belassi

      December 11, 2015 at 2:21 am

      At pH11 it will saponify grease so yes, it should work fine, but you’d need to use hand protection of course.

    • ozgirl

      December 10, 2015 at 10:27 pm

      It is definitely looks like an ok starting formula. I personally would swap the sodium hydroxide with a chelating agent such as EDTA or a different alkaline salts such as sodium carbonate or similar

      Is this going to be sold as a concentrate or a ready to use product?

    • Chemist77

      December 10, 2015 at 9:08 am

      Depends on your targeted final pH. 

    • isra

      December 10, 2015 at 8:49 am

      thank you

      i don’t have that much experience 

      no my formula is not thick so much and yes i faced difficulty solublize limonene
      the final pH is around 11
      it is a modified formula from a formula from stepan company
      do you advice to remove sodium hydroxide or reduse its quantity? 
    • Chemist77

      December 10, 2015 at 8:34 am

      OK is your formulation that much thick that you have to use 10% of xylene sulfonate, or you having difficulty to solubilize limonene. I see sodium hydroxide, whats the final pH of your formula and did you check other such formulations and their parameters to see if you are close to them or too wayward??? Sodium hydroxide here seems to be more of a pH adjuster as I don’t see anything that is being neutralized here. 

      Just compare your formula and its ingredients with those available online as starters. 
    • isra

      December 10, 2015 at 8:17 am

      yes sure i will do it 

      but i want your opinion :)
    • Chemist77

      December 10, 2015 at 8:03 am

      The best evaluation would be by putting it into use and see how it cleans and de-greases. 

    Ation item #
    6 surfactant myristamine oxide 1
    1.4 neutralizer sodium hydroxide 2
    10 hydrotop SXS 3
    75.6 diluent purified water 4
    2 solvent Dlimonen 5
    q.s fragrance  perfume 6
    5 emylsifing agent alcohol ethoxylate 7 EO  7