The Nanotechnology Industry Association has announced a project aiming at evaluating the safety of bentonite nanoclay. In the RefNanoClayM project a stepwise approach is used to investigate environmental fate and ecotoxicological behavior. First, standard toxicity tests are proposed and secondly relevant adaptations of test protocols are elaborated on. The project will form part of the Organization of Economic Co-operation and Development (OECD) Working Party on Manufacture Nanomaterials and is a public-private partnership. Like other nanoclays, bentonite is added to packaging in order to increase barrier properties.