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3D3DOsmium tetroxide.
Osmium tetroxide is extremely poisonous and volatile, so if you so much as lean over it, it can severely harm your eyes. Fortunately my sample is sealed in a glass tube inside a protective plastic outer tube.
Source: Tryggvi Emilsson and Timothy Brumleve
Contributor: Tryggvi Emilsson and Timothy Brumleve
Acquired: 12 November, 2002
Price: Donated
Size: 0.2"
Purity: <20%