SLS Alternatives for Toothpaste Foam
Question
I am looking for alternatives to SLS to create foam in a toothpaste formulation, especially one containing calcium carbonate. The staff recommended using Sodium Lauroyl Glutamate (e.g., AminoWash) and Lauryl Glucoside. Could you please explain how this combination works and what considerations are needed, particularly regarding pH adjustment for Lauryl Glucoside?
Answer
SLS Alternatives for Toothpaste Foam
For adding foam to your toothpaste formulation as an alternative to SLS, the staff recommendation of using Sodium Lauroyl Glutamate (such as the product referred to as "AminoWash") in combination with Lauryl Glucoside is a good approach.
Here's why this combination works well:
Lauryl Glucoside: This is a gentle, non-ionic surfactant derived from natural sources. It is often used in formulations intended for sensitive skin and can replace harsher sulfates like SLS. However, as noted in its description, Lauryl Glucoside itself does not produce significant foam. It functions well as a detergent but needs assistance for foaming.
Sodium Lauroyl Glutamate: This is an amino acid-based anionic surfactant. Surfactants in this class are known for being very mild and providing good foaming properties, even in the presence of ingredients like calcium carbonate which can sometimes reduce foam. Combining it with Lauryl Glucoside helps to create a stable and satisfactory foam while keeping the overall formulation gentle.
Using these two ingredients together allows you to achieve the desired foaming action in your toothpaste while using milder alternatives to SLS.
Important Note: Lauryl Glucoside has a high pH (around 11.5). You will need to adjust the pH of your final toothpaste formulation to a suitable range for oral care (typically between 5-7) using an acid like Citric Acid or Lactic Acid. This is crucial for both stability and gentleness.
By combining Sodium Lauroyl Glutamate and Lauryl Glucoside and adjusting the pH, you can create a gentle yet effective foaming toothpaste.
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