Namely
Unfortunately, the term "fragrance" conceals many odorous molecules that are potentially irritating or even allergenic. It's hard to know what to do when you're allergic to a product and the information isn't very detailed. Nevertheless, to help us, Europe has regulated 24 molecules which, when used above a certain concentration, must be mentioned in the INCI list (generally at the end), even though they are themselves part of the fragrance of a product. This is the case, for example, with limonene, linalool, etc.