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• n  a soft grey malleable metallic element that resembles tin but discolors on exposure to air; it is highly toxic and is used in rodent and insect poisons; occurs in zinc blende and some iron ores

• Of all the poisons man has concocted to combat his insect and rodent enemies, thallium sulfate is one of the most potent.
• There police found "enough thallium to keep a pharmacy in business for an entire month.
• Thallium is deadly poison itself, poisons every compound it goes into.

• Tl
• atomic number 81

News & Articles

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• Monroe woman threatened to poison her husband two years before he died, father testifies
  Xiaoye Wang died in January 2011 of thallium poisoning, just before the Wang and Li finalized their divorce
  June 11, 2013 - The Star-Ledger

Quotes

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• John Henry in 오마이뉴스
  I can tell you he's ill. He is quite seriously sick. There's no doubt that he's been poisoned by thallium, and it probably dates back to Nov. 1, when he first started to get ill,Henry said.
• Oleg Gordievsky in Daily Mail
  Gordievsky, who was the KGB station chief at the Soviet embassy in London in the Eighties, believes his would-be assassin used a "variant or derivative of thallium".