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Defra: HARN

Potential health effects of high aspect ratio nanoparticles

Defra _200This project addressed concerns about the potential health effects of high aspect ratio nanoparticles (HARN). It did so by undertaking a scoping study to review the existing literature on industrial fibres and HARN to determine whether high aspect ratio nanoparticles (HARN) should raise the same concerns as do asbestos fibres; and setting out a research strategy towards determining whether the health concerns about HARN are well–founded.

The consortium behind the HARN report was comprised from members of SnIRC (the Safety of Nanoparticles Interdisciplinary Research Centre) – including IOM, Edinburgh University & Napier University; with additional input from the National Physics Laboratory, London. In preparation of the report, opinion was also sought from a variety of leading experts across a range of stakeholder groups, from both within the UK and throughout Europe.

The report was completed and published in January 2009.

The final HARN report is available to download here.

Did you know?

4 µm is the median aerodynamic diameter of particles that fall within the respirable size range.