The Canadian Ministers of Environment and Health reached the same conclusion in January 2009 when it stated in their Final Screening Assessments for D4, D5 and D6 that these chemicals "do not pose a risk to human health."
The Illinois EPA, after discussing the various exposures and evaluating a two year bioassay study, concluded that "Under the exposure scenarios defined in this assessment, typical exposure to D5, whether occupationally, to consumers, or to the general public, would not result in a significant human health risk."