Dangers and biological roles
Powdered thorium metal is pyrophoric and will often ignite spontaneously in air. Natural thorium decays very slowly compared to many other radioactive materials, and the alpha radiation emitted cannot penetrate human skin meaning owning and handling small amounts of thorium, such as a gas mantle, is considered safe. The decay of thorium does, however, create radon gas so caution should be exercised when thorium decays in closed spaces. Exposure to an aerosol of thorium can lead to increased risk of cancers of the lung, pancreas and blood, as lungs and other internal organs can be penetrated by alpha radiation. Exposure to thorium internally leads to increased risk of liver diseases.
The element has no known biological role.
http://en.wikipedia.org/wiki/Thorium#Dangers_and_biological_roles
Is this a chicken little exercise by those against Lynas and should I therefore sell?
Dangers and biological rolesPowdered thorium metal is pyrophoric...
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