Osmium Tetroxide (OsO4), a severe oxidizer, is highly poisonous even at low exposure levels. It must be handled with appropriate precautions. In particular, inhalation at concentrations well below ...

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Osmium tetroxide is toxic, highly reactive, must be handled with care and is purchased only in tiny quantities. But it would not be a professional chemist's first choice for a bomb, experts said ...

Osmium tetroxide can cause serious damage to people but it's so rare and expensive, it's hard to imagine anyone using it to do harm, a Carleton University professor says. "It's a liquid. If you heat ...

Never heard of osmium tetroxide? Neither did the experts on chemical warfare at the British Defence Intelligence Branch on 4 April 2004, when news of the deadly substance in terrorist hands hit the ...

Osmium tetroxide is a rare and expensive toxic chemical used as a staining agent for biological samples examined under electron microscopes. At room temperature, osmium tetroxide sublimates (turns ...

Before last week, hardly anyone had heard of osmium, let alone its tetroxide. But on 5 April, the chemical achieved global notoriety as the latest weapon in the arsenal of terrorists. The world’s ...

Osmium tetroxide is a rare and expensive laboratory chemical that is hazardous, but a leading chemistry expert thinks it would be difficult to use as a weapon. At room temperature it is a colourless ...