The safety of ethyl decanoate has been evaluated by the Research Institute for Fragrance Materials (RIFM), with a published peer-reviewed safety assessment. 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 contact at a sufficiently high level may cause a temporary reaction, including redness, rash, or itching on the skin.
Most European countries consider this ingredient safe for use in everyday products without concern for skin sensitization. RIFM has established a maximum acceptable concentration level for this ingredient in household 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. Every person's skin is different, so consult a healthcare professional for any questions you may have.