Imidacloprid has undergone an extensive evaluation in 2007 by the US
Environmental Protection Agency.
Imidacloprid is not considered to be a carcinogen, teratogen or reproductive
toxicant. It is classified as a pesticide of moderate toxicity by the World
Health Organization following acute exposure.
The US EPA review document can be accessed at:
http://www.regulations.gov/search/Regs/home.html#documentDetail?R=09000064807d7c3d Please click on the PDF icon to download the document.