Home Cosmetic Science Talk Formulating PH Level in Concentrated Solution and After Dilution

Tagged: ,

  • PH Level in Concentrated Solution and After Dilution

    Posted by sudsmaster on February 18, 2021 at 12:18 am

    Hi. This has been bothering me for days since I’m creating some cleaning solutions that I would like to be a little alkaline after dilution. But after dilution, it understandably goes down to neutral ph. How can I keep it on an alkaline level?

    For example, I’ve added NaOH to reach my desired level at concentrated solution. Or should I add more NaOH and go above my target ph level at concentration so that after dilution it can meet my target ph?

    I’m no chemist so this might sound silly to the pros here. Just an enthusiast here. Thanks!

    PhilGeis replied 3 years, 1 month ago 3 Members · 5 Replies
  • 5 Replies
  • ozgirl

    February 18, 2021 at 2:51 am
    You will need to provide more information on your formulation to get useful answers.
    Generally you will need to increase the pH in your concentrated product to allow for the drop when it is diluted.
  • sudsmaster

    February 18, 2021 at 1:22 pm

    Hi ozgirl. Thanks for the reply.

    I have this dishsoap and would like to convert it to some sort of acid washer to be used on some of our hard surfaces at the yard.

    SLES 10%
    CFAS 6%
    LABSA 3%
    NP10 2%
    NaOH 0.8%
    NaCl 1.5%

    How can i keep this alkaline once diluted? Preferably PH10 at least.

  • ozgirl

    February 19, 2021 at 12:28 am
    What is CFAS?
    You could try adding Tetrasodium EDTA  or sodium metasilicate to boost alkalinity.
    Is the acid washer you refer to a separate product?
  • sudsmaster

    February 19, 2021 at 8:16 am

    Sodium Coco Fatty Alcohol Sulfate (CFAS)

    Yeah I was thinking about EDTA and SMS  but it would bump the PH really high. Also with NaOH in the solution. Is it ok even if the PH goes off the roof since dilution will just bring it back down? I’m concerned that if I raise the PH too much, the cleaning power of some of the surfactants might weaken.

    Well you can say a separate product. I’m just lazy to do research and reformulate so thought of starting with the formula I currently have lol. If it fails then I guess I should start from scratch.

  • PhilGeis

    February 22, 2021 at 12:02 pm

Log in to reply.