4-Amino-2,1,3-benzothiadiazole is a gold green to yellow brown powder. It undergoes palladium catalyzed C-N coupling with 2-(2′-bromo-9′,9′-diethylfluoren-7′-yl)-9,9-diethylfluorene to form novel fluorescent dyes. 4-Amino-2,1,3-benzothiadiazole forms dicopper complexes.4-Amino-2,1,3-benzothiadiazole was used in a study to synthesize and evaluate the inhibitory activity of a series of substituted benzimidazoles and small benzothiadiazoles on rat liver methionine synthase. It was used as potential levelers for Cu plating in submicrometer trenches. 4-Amino-2,1,3-benzothiadiazole is a gold green to yellow brown powder. It undergoes palladium catalyzed C-N coupling with 2-(2′-bromo-9′,9′-diethylfluoren-7′-yl)-9,9-diethylfluorene to form novel fluorescent dyes. 4-Amino-2,1,3-benzothiadiazole forms dicopper complexes. 4-Amino-2,1,3-benzothiadiazole was used in a study to synthesize and evaluate the inhibitory activity of a series of substituted benzimidazoles and small benzothiadiazoles on rat liver methionine synthase. It was used as potential levelers for Cu plating in submicrometer trenches.