OECD Requests Input on Draft Guidance for Toxicokinetics Testing of Nanoparticles

NIA Staff
1 min read

Summary

  • The OECD is seeking feedback on how to redesign toxicokinetics studies for particulate materials, where standard protocols fall short.

  • The outcome will shape how human health assessments are conducted for nano-enabled products across all OECD member countries.

The OECD is conducting a public consultation on draft guidance for adapting toxicokinetics studies to nano- and microparticles. The consultation closes November 11, 2025.

The guidance addresses design considerations including dosing, formulation, and kinetic sampling to ensure toxicokinetics data accurately represent particulate materials. The document will support harmonized human health assessments for nano-enabled products across OECD member countries.

Find out more about the consultation on the OECD website.

EPA Publishes Significant New Use Rules (SNURs) for MWCNTs ( Cloned )

The EPA has finalized new rules targeting multi-walled carbon nanotubes — and companies handling them may need to act now to stay compliant.Employers face strict respiratory protection mandates, with required protection factors varying based on how effectively exposure is captured and reduced.MWCNTs are flagged for a sweeping range of health hazards — from carcinogenicity and reproductive toxicity to aquatic harm — triggering mandatory GHS-aligned hazard communication.Generating vapor, mist, dust, or aerosol during processing triggers reporting requirements unless operations are fully enclosed.

Read More

European Commission Requests SCCS Opinion on Titanium Dioxide in Cosmetics

Titanium dioxide, a staple UV filter and whitening agent in sunscreens and cosmetics, is facing a formal EU safety review after carcinogen and genotoxicity concerns emerged in other regulatory contexts.The SCCS previously could not rule out genotoxicity for most TiO2 grades in oral cosmetics, putting products like toothpaste squarely in the crosshairs.Industry submitted new data in June 2025, triggering the 12-month assessment that could result in concentration limits or broader restrictions.

Read More

OECD Opens Public Consultation on Draft Guidance for In Vitro Testing of Orally Ingested Nanomaterials

The OECD is seeking input on how to standardize safety testing for nanomaterials that enter the body through food, drugs, and consumer products.The draft guidance tackles a poorly understood area: how nano and microparticles dissolve, transform, and get absorbed as they move through the digestive system.Regulators, industry, and academics all have a stake in the outcome, with harmonized protocols set to reshape toxicokinetic assessments globally.

Read More