NIOSH stepped up its efforts to provide a scientific basis for potential future workplace standards to control exposure to nanomaterials, producing a draft document that includes a recommended exposure limit (REL) of 7 micrograms of carbon nanotubes and nanofibers per cubic meter of air. The proposal comes as NIOSH officials are holding preliminary discussions with OSHA on ways to potentially address worker exposure to nanomaterials. OSHA and NIOSH are taking steps to jointly investigate and characterize possible workplace risks associated with nanotechnology, with a goal to recommend workplac
December 30, 2025