The National Institute for Occupational Safety and Health (NIOSH) of the Centers for Disease Control and Prevention (CDC) intends to evaluate the scientific data on engineered nanomaterials (ENMs) to develop categorical occupational exposure limits (OELs) based on the available scientific evidence regarding the hazard or safety of these materials.
NIOSH seeks to obtain materials, including published and unpublished reports and research findings, to evaluate the possible adverse health risks of occupational exposure to ENMs.
Resource:
https://www.federalregister.gov/documents/2019/12/17/2019-27169/request-for-information-on-toxicological-and-physicochemical-data-of-engineered-nanomaterials-to