Evidence: Well-supported occupational data; 10 µg/m³ is a band, not an OSHA PEL
NIOSH sampled workers at 11 US graphene producers/users. Many samples exceeded a conservative occupational exposure band of 10 µg/m³ when dry powder was handled. Recommendation: supply graphene in masterbatch/liquid rather than loose powder. No reported human disease cluster tied to these data.
Archive file: topics/policy/2026-09-16-niosh-graphene-exposure.md