Thiocyanic acid (2-benzothiazolylthio)methyl ester, commonly known as 2-(thiocyanatomethylthio)benzothiazole (TCMTB), is a specialty chemical primarily used as a broad-spectrum biocide, fungicide, and bactericide. In agriculture, it effectively controls fungal and bacterial pathogens causing crop diseases, particularly through seed treatments and foliar applications to prevent disease spread and enhance yield. It is also applied in industrial settings for wood preservation, leather processing, and as a microbial inhibitor in paints, adhesives, textiles, and rubber products to prevent degradation and improve durability. While it can serve as an intermediate in organic synthesis for benzothiazole derivatives used in pharmaceuticals and agrochemicals, its main commercial value lies in biocidal applications rather than general synthesis.