Using Phenoxyethanol in Cosmetics

Yes, Phenoxyethanol is commonly used in cosmetic formulations as a preservative. Your understanding that it can be added in the final step, similar to other ingredients in a lotion, is correct for some types, but it depends on the specific form of Phenoxyethanol or the blend being used.

• Pure Phenoxyethanol (like Phenoxyethanol (Extra Pure) or Phenoxyethanol P5): These can typically be added at any step of the formulation process, as long as the temperature of the cosmetic base is below 80°C and the pH is between 2-9. It dissolves in the water phase.
• Phenoxyethanol Blends (like Phenoxyethanol SA or Chlorphenesin / Phenoxyethanol): These blends are often recommended to be added in the final step of the formulation. They usually have specific temperature and pH requirements (e.g., below 60°C and within a certain pH range like 2.0-6.0 or 4.0-7.0).

Therefore, while adding in the final step is a common practice, especially for certain blends, it's important to check the specific instructions for the particular type of Phenoxyethanol you are using to ensure optimal effectiveness and stability.