Ethyl butylacetylaminopropionate is an insect repellent whose trade name is IR3535 and was developed and commercialized by Merck KGaA. It is a colorless and odorless oil with a good skin feel in final products, and it is biodegradable.
Unlike icaridin, IR3535 can dissolve some plastics and synthetic fabrics, except polyethylene and polypropylene. From Wikipedia
