Home Cosmetic Science Talk Formulating Hydrochloric acid upper safe limit for rinse off product?

  • Hydrochloric acid upper safe limit for rinse off product?

    Posted by abdullah on September 1, 2021 at 9:19 am

    What is the maximum safe use level for hydrochloric acid in shampoo and body wash? 

    I currently have shortage of citric acid and local suppliers doesn’t have it. 

    I am currently making shampoo with SLS powder and it needs 5% citric acid to adjust the pH to 5.

    I did use salicylic acid and it needed 10% salicylic acid to adjust the pH 😃 so not a practical replacement. 

    abdullah replied 2 years, 5 months ago 3 Members · 5 Replies
  • 5 Replies
  • oldperry

    Member
    September 1, 2021 at 2:03 pm

    The safety of it depends on the pH level.
    Use only enough to adjust the pH to an appropriate level and you’ll be fine.
    It dissociates in water to H+ and Cl- ions.

  • PhilGeis

    Member
    September 1, 2021 at 2:52 pm

    Use PPE

  • abdullah

    Member
    September 1, 2021 at 2:53 pm

    @PhilGeis what is PPE? 

  • PhilGeis

    Member
    September 1, 2021 at 2:59 pm

    Personal protection equipment for you - eye shields etc.

  • abdullah

    Member
    September 2, 2021 at 12:40 am

    @PhilGeis thanks

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