2,5-二巰基噻二唑 Bismuththiol ;2,5-Dimcrcapto-1 ,3,4-thiadiazolc Appearance:Yellow to yellowish crystalline powder 該品為分析試劑,與鉍反應呈紅色,與銅呈褐色,與鉛生成鮮黃色沉澱。用於比色測定鉍,光度測定銻和鈀。