The safety of 4-tricyclodecylidene butanal has been evaluated by the Research Institute for Fragrance Materials (RIFM), and a safety assessment has been published following scientific review. It was found to have the potential to cause skin sensitization in a small percentage of individuals. This means that in a limited number of people, repeated exposure at a sufficiently high level may cause a temporary reaction, including skin redness, rash, or itching.
To prevent sensitization, RIFM has established a maximum acceptable concentration level for this ingredient in home care products, air care products, cosmetics, and personal care products. Although an ingredient may have the potential to cause skin sensitization, most people will not be affected. Everyone's skin is different, so consult a healthcare professional with any questions you may have. The fragrance industry supports the disclosure of specific ingredients so that individuals who may already be allergic can choose products that suit them.