CPWR has launched the Nano Safety Data Sheet (SDS) Improvement Tool, which will help manufacturers, distributors, and importers of products containing nanomaterials strengthen their SDSs. CPWR’s existing eLCOSH Nano Inventory provides information about the use of manufactured nanomaterials in a wide range of over 800 construction products, but studies show that many SDSs do a poor job of communicating nanomaterial hazard information for protecting workers. The free, interactive SDS Improvement Tool uses questions to evaluate an existing SDS and generate recommendations, based on authoritative guidance, regulations, and good industrial hygiene practice. SDS users may also find this tool helpful to evaluate the information they receive about potential nanomaterial hazards.