The ETUI has published a body of information on nanotechnologies over the years. This booklet on the production and use of nanomaterials in workplaces is a new addition. Nanomaterials are coming onto the market in a widening range of uses at a dizzying pace, but the impact on society is going largely undiscussed and the European regulatory framework is arguably ill-suited to these microscopic-scale materials. What we know of the risks involved for those who make or use them is scant and very patchy. Animal studies are sending out warning signals about the toxicity of some of them.