 Under European Union Directive 2011/65/EU  revision 2015/863  (commonly known as RoHS 3), DBP is limited to max 1000 ppm concentration in any homogenous material.Dibutyl phthalate (DBP) is one of the six phthalic acid esters found on the Priority Pollutant List, which consists of pollutants regulated by the United States Environmental Protection Agency (U.S. EPA).DBP is leached from landfills.