Quote Originally Posted by Photo Engineer View Post
Tim Rudman on Pyro:

The lowest known lethal dose of pyro was 28 mg/kg (Registry of Toxic Effects of Chemical Substances, 1985 - 86) on page 69 of his book "The Book of Pyro and the PMK Formula". Also, quoted in Anchell and Troop as the most dangerous chemical in the darkroom today.

I didn't write this book PE. Did you mean Gordon Hutchings?