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Titanium dioxide in face powders and eyeshadows: Developing an analytical methodology for accessing customer safety
Diana Amorello1, Marzia Ferrara1, Santino Orecchio1
1Department of Science and Technology Biological, Chemical and Pharmaceutical, University of Palermo, Palermo, Italy.
Journal of Cosmetic Dermatology
|June 20, 2024
Summary
This study quantifies titanium dioxide (TiO2) in cosmetics. High TiO2 concentrations were found in eyeshadows, with one blue eyeshadow sample containing 36% TiO2.
Area of Science:
- Analytical Chemistry
- Materials Science
Background:
- Titanium dioxide (TiO2) is a widely used opacifier in various consumer products.
- Its presence in cosmetics necessitates accurate quantification methods.
Purpose of the Study:
- To determine the titanium dioxide (TiO2) content in cosmetic products.
- To develop an efficient method for TiO2 analysis in eye shadows and face powders.
Main Methods:
- Uv-Vis spectrophotometry was employed for TiO2 quantification.
- A novel microwave-assisted acid mixture mineralization method was developed for sample preparation.
- The new method allowed simultaneous processing of six samples in 45 minutes.
Main Results:
- 88 samples of eye shadows and face powders were analyzed.
- Highest TiO2 concentrations were detected in eyeshadows.
- A maximum TiO2 concentration of 36% was recorded in a blue eyeshadow sample.
Conclusions:
- The developed method offers an efficient and rapid approach for TiO2 quantification in cosmetics.
- Titanium dioxide (TiO2) is present in significant amounts in eyeshadows, particularly those with intense coloration.
