Perhaps it was one of these that killed him, since he had a penchant for tasting his discoveries.
Among his discoveries were glycerine and the toxic gases hydrogen sulfide, hydrogen cyanide, and hydrogen fluoride.  Perhaps it was one of these that killed him, since he had a penchant for tasting his discoveries. A pharmacist in Koping, he wrote the 1777 work Chemical Observations and Experiments on Air and Fire.  FTP, name this man, the first to isolate tartaric acid, who probably discovered oxygen two years before Priestley.
Among his discoveries were glycerine and the toxic gases hydrogen sulfide, hydrogen cyanide, and hydrogen fluoride.  
Carl Wilhelm Scheele