The Nanomaterial Registry compiles data from multiple databases into a single resource. The goal of this resource is to establish a curated nanomaterial registry, whose primary function is to provide consistent information on the biological and environmental interactions of well-characterized nanomaterials, as well as links to associated publications, modeling tools, computational results and manufacturing guidances. The publicly available Registry is intended to serve as a comprehensive resource for the nanomaterial community, providing data that has been systematically curated based on minimal information standards built with broad community acceptance. It provides a way to tie together different sources of information for a specific nanomaterial and allows users to search and compare characteristic data on different nanomaterials. The registry provides tools for analyzing and comparing data on the biological and environmental implications of well-characterized nanomaterials. This resource will evolve as the quality and quantity of the information on nanomaterials improve. Hundreds of nanomaterial entries have been curated into the registry for physico-chemical characteristics and are available to the public. Biological and environmental study data for existing nanomaterial entries will also be curated into the registry. The nanomaterial registry provides the following functions for the research community: basic and advance search through key words or physical and chemical characteristics (PCC); ability to browse nanomaterials based on categories; detailed information about PCC and the biological, and environmental interactions of nanomaterials; display the quality of the characterization of each nanomaterial entry in the form of compliance level that is algorithm based; compare PCC and the biological and environmental interactions of nanomaterials; and find similar nanomaterials based on PCC and the biological and environmental interactions of nanomaterials.