WWF-UK is sending a report that shows how man-made chemicals have affected children's brain development, to MPs, MEPs and EU committee members.
The report, called Compromising our Children, reveals that the impacts of such chemicals on children in the EU have reduced memory, visual recognition and movement skills, as well as having lowered IQ scores.
It also raises concerns around the apparent increase in autism and attention-deficit hyperactivity disorder, and the role that chemicals may play in creating them.
The charity wants recipients of the report, also published online last week, to recognise the dangers and persuade colleagues to build tight EU legislation to regulate industrial chemicals.
The EU is currently debating Europe's biggest reform of chemical legislation, which the charity hopes will phase out the global contamination of living things by hazardous chemicals.