Nanomaterials have been the object of numerous public and private initiatives aiming to manage their risks and maximise their benefits. Proponents of nanotechnology programmes argue that their potential negative impacts need to be dealt with appropriately, and wish to integrate these concerns early in the industrial development of these substances. Science policy programmes do not provide a clear definition of the term “nanomaterials”. Defining nanomaterials, however, has become a central concern. It is called for by manufacturers who wish to sell the “nano” quality of their products as well as by associations who wish to classify products in order to facilitate consumer choice or introduce constraints on production.
This is more than an obscure technical and legal issue for specialists. Indeed, science and technology studies has shown that technical classifications perform social order, and that the creation of new entities destabilises the conduct of democratic life. For instance, Sheila Jasanoff demonstrates that the “ontological uncertainty” of biotechnological objects leads to the construction of different political forms in the United States and Europe. Building a legal and technical framework for biotechnology objects allocates public roles, defines expertise objectivity, and identifies public concerns – in short, it shapes political organisations at the same time as it constructs technological definitions.