Sulfate Free Shampoo Base Active Matter and Preservatives

Regarding the Sulfate Free Shampoo Base, the active matter percentage is 44%.

The preservatives used in this base are Methylchloroisothiazolinone and Methylisothiazolinone.

While you inquired about a version preserved with Sodium Benzoate, the current Sulfate Free Shampoo Base utilizes Methylchloroisothiazolinone and Methylisothiazolinone. These preservatives are permitted for use in rinse-off products according to regulatory guidelines. As noted, they are present at a very low concentration within the base, which minimizes potential for irritation when used in formulations.