A total of nine ERM identifiers were used in the caLIBRAte project. The focus of the project was on specific NRCWE nanomaterials that already had their own identifiers. These NRCWE IDs were coupled to ERM identifiers in the caLIBRAte -eNanoMapper database at search.data.enanomapper.net/projects/calibrate. With this mapping (currently internal to the project), the ERM ids provide information on the chemistry, state and supplier of the nanomaterials.