p>Volatile fragrance ingredient that must be listed on products that contain it due to its risk of causing a sensitized reaction. It’s an ingredient to avoid if you have sensitive skin, especially because it is almost always combined with other volatile fragrance components such as linalool and eugenol.
References for this information:
Analytical and Bioanalytical Chemistry, July 2010, issue 6, pages 2579-2591
Journal of Chromatography, April 2010, issue 16, pages 2599-2605