3D model (JSmol)
|Molar mass||215.29 g·mol−1|
|Density||0.998 g/cm3 (at 20 °C)|
|70 g/L (at 20 °C)|
|Solubility in Acetone, ethyl acetate, dichloromethane, n-heptane, methanol, p-xylene||>250 g/L (at RT)|
|log P||1.7 (at 23 °C)|
|GHS signal word||Warning|
|P280, P305+351+338, P337+313|
|Flash point||159 °C (318 °F; 432 K)|
|Lethal dose or concentration (LD, LC):|
LD50 (median dose)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
IR3535 (Insect Repellent 3535) or ethyl butylacetylaminopropionate, is one of the most common active ingredients in insect repellents. As it is solely a repellent it has no killing action and does not give rise to selection pressure or development of resistance. It is a colourless and almost odourless oil and is intended to be applied to the skin (humans and animals).  It has a broad efficacy against various insects like mosquitoes, ticks, lice, and other bugs.  In comparison to other insect repellent active ingredients, IR3535 is safe for use even on infants, pregnant and breastfeeding women. It is biodegradable and completely degraded in the environment within a very short time.
The structure of IR3535 is based on beta-alanine. The EPA has classified IR3535 as a biochemical substance (biopesticide) based on the fact that it is "functionally identical" to beta alanine. 
- EU Assessment Report IR3535
- EPA Technical Document IR3535
- EPA Fact Sheet IR3535
- "Insect Repellent IR3535".
- "EPA, Draft Pesticide Product label for IR3535" (PDF).
- EPA: Similarity to beta-alanine
- EPA: Regulating Biopesticides
- EPA: IR3535 technical document