Used primarily as a reagent in organic synthesis, particularly in Stille coupling reactions, where it serves as a source of the benzoic acid moiety in the formation of biaryl compounds. The trimethylstannyl group acts as an effective coupling partner with aryl halides in the presence of palladium catalysts, enabling the construction of complex aromatic structures. This makes it valuable in pharmaceutical and agrochemical research for building conjugated systems found in active ingredients. Due to the toxicity of tin compounds, its use is generally restricted to controlled laboratory settings with proper handling and disposal protocols.