What was the most dangerous thing you studied with drugs

Question: What was the most dangerous thing you studied with drugs
- Keywords:
  dangerous,
  research,
  study
Asked by 677nenp29 to Bernard on 5 Nov 2018.
- Bernard answered on 5 Nov 2018:
  
  I have worked with cannabis,heroin,cocaine and opium all of which are dangerous drugs.The most toxic drug I have handled is Botulinum toxin it is the most toxic substance known. I once had to make up a wart removal solution containing trichloroacetic acid which was quite tricky to make safely.

Question: What was the most dangerous thing you studied with drugs