Trimethyltin hydroxide is an organotin compound primarily utilized as a reagent in organic synthesis, particularly for the preparation of trimethylstannyl ethers from alcohols and in transesterification reactions. It also acts as a catalyst in certain polymerization and esterification processes. While it possesses strong antimicrobial and fungicidal properties, making it suitable for niche biocidal applications such as wood preservation or experimental agricultural treatments, its extreme neurotoxicity and environmental persistence restrict its use to controlled laboratory and industrial settings, prohibiting widespread commercial deployment.