• Question: what is the most toxicant chemical

    Asked by MiniNewton to Chris, Josh, Rebecca, Rob, Susan on 23 Jun 2015.
    • Photo: Susan Cartwright

      Susan Cartwright answered on 23 Jun 2015:

      I’m not sure, but botulinum toxin has got to be up there. The lethal dose is about 2 ng/kg when injected – i.e., 1 gram would kill about 7 million people!!!!
      (It’s only one-fifth as deadly when inhaled: your 1 g would only do in about 1.4 million people.)

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