Formulating a Scrub: Lauryl Glucoside Percentage, Glycerin, pH Adjustment with Acids

Asked by: aor_jun On: May 14, 2013 Product Type: Cosmetics

Question

I am formulating a scrub and have some questions regarding the ingredients and pH adjustment:

  • What is the recommended percentage range for adding Lauryl Glucoside to the formula?
  • Can Glycerin be added to the formula, and if so, what percentage?
  • I understand that Lauryl Glucoside has a high pH and needs adjustment. Can I use Citric Acid or Lactic Acid for this?
  • Is there a specific amount of Citric Acid or Lactic Acid needed for a certain percentage of Lauryl Glucoside to reach a target pH (e.g., pH 5.5)? Or how should I determine the correct amount?

I prefer a product with less foam, but I want the oil base to rinse off easily.

Answer

Here is the information based on the discussion:

  • Lauryl Glucoside Percentage: You can add Lauryl Glucoside at a concentration of 10-25% of the total formula weight. It's noted that combining it with Cocamidopropyl Betaine is often recommended for a milder product with more foam, but you mentioned you prefer less foam. Adding Lauryl Glucoside can help the oil base rinse off more easily.
  • Glycerin: Glycerin is a humectant that can be added, but a specific percentage was not provided in the discussion.
  • pH Adjustment: Lauryl Glucoside has a relatively high pH, so adjusting the pH of the final product is recommended.
  • Using Acids: Acids like citric acid or lactic acid can be used to lower the pH.
  • Recommended Acid: Lactic acid is recommended over citric acid for a scrub formulation because it also offers exfoliation benefits in addition to adjusting pH.
  • Amount of Acid: There is no fixed amount of acid (like citric acid or lactic acid) needed for a specific percentage of Lauryl Glucoside. The correct method is to measure the pH of your mixture and add the acid gradually, mixing well after each addition, until you reach your desired pH (typically around 5.5 for skin products). Measuring the pH is the most accurate way to ensure the correct level.

Tags

Easy Rinsing Exfoliation Scrub Usage Percentage pH Adjustment