Providing community standards, of nanosafety, as FAIR maturity indicators under subprinciple R1.3 is a logical progression towards having a harmonized metadata standard and a common ground for nanosafety data FAIRification and reusability assessment. A Minimum Reporting Standard (MRS), which might also be referred to as a minimum information checklist, a minimum information criteria, a minimum information standard, or a data reporting guideline, defines a set of (meta)data that should be reported by experimentalists and/or captured during data curation . However, the exact metadata that must be reported is highly dependent on the data type and the proposed research question. A review by Stefaniak et al. in 2012 identified 28 proposed lists for physicochemical properties that were considered essential for risk assessment . However, physicochemical properties cannot alone determine the risk of nanomaterials and their health impacts. Exposure type, the dose, the tissue/cells in contact, and other variables play a vital role in the toxic effects of nanomaterials due to the intertwined effects of those variables on the biological/environmental behaviour. For example, an inhaled titanium dioxide nanomaterial (TiO2) has a different effect than skin contact with cosmetics containing TiO2 where studies showed that TiO2 did not penetrate the skin to the level of reaching viable cells or the general circulation while in case of inhalation, it showed a mild to moderate lung inflammation in mice . Therefore, it is important to include in vitro/in vivo experimental condition variables in nanosafety studies data aimed in order to better helps cross-compare the experiments and interpret their results.