evaluation

• 

  Chemist77

  Member

  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. 

• 

  isra

  Member

  December 10, 2015 at 8:17 am

  yes sure i will do it 

  but i want your opinion
• 

  Chemist77

  Member

  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

  Member

  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

  Member

  December 10, 2015 at 9:08 am

  Depends on your targeted final pH. 

• 

  ozgirl

  Member

  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?

• 

  belassi

  Member

  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.

• 

  isra

  Member

  December 13, 2015 at 6:06 am

  thank you all

  it would be sold ready to use product
• 

  belassi

  Member

  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?

• 

  ozgirl

  Member

  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.

• 

  RobertG

  Member

  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!

Log In to Reply

• Public
• All Members
• Only Me

• Public
• All Members
• Only Me