Replacement of benzidine by copper ethylacetoacetate and tetra base as spot-test reagent for hydrogen cyanide and cyanogen.
D001713:Biphenyl Compounds; D002273:Carcinogens; D003486:Cyanides; D007202:Indicators and Reagents
D001713:Biphenyl Compounds; D002273:Carcinogens; D003486:Cyanides; D007202:Indicators and Reagents