3-[N-Butyl-N-acetyl]-aminopropionic acid, ethyl ester
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|Molar mass||215.29 g·mol−1|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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IR3535 (Insect Repellent 3535) or Ethyl butylacetylaminopropionate, is an insect repellent. Merck KGaA is the registered trademark owner of IR3535 in the United States. IR3535 is a synthetic insect repellent that is additionally classified as biopesticide by the EPA. It was used in Europe 20 years prior to its registration with the EPA as an active ingredient in February 1999.
The structure of IR3535 is based on alanine and beta-alanine. The EPA has classified IR3535 as a biochemical substance based on the fact that it is "functionally identical" to beta alanine: both repel insects and the end groups of IR3535 are not likely to contribute to toxicity. 
- USPTO: Trademark registration record for IR3535
- EPA: Regulating Biopesticides
- EPA: Fact sheet on IR3535
- Medscape: Insect Repellents
- EPA: Similarity to beta-alanine
- EPA: IR3535 technical document