Tributyltin oxide
（重定向自Tetrabutyl tin）
![](/Images/godic/202502/15/Tributyltin_oxide_structure.svg5457.png")
![](/Images/godic/202502/15/Tributyltin-oxide-3D-vdW5457.png")
Tributyltin oxide (TBTO) is an organotin compound chiefly used as a biocide (fungicide and molluscicide), especially a wood preservative. Its chemical formula is [(C4H9)3Sn]2O. It has the form of a colorless to pale yellow liquid that is only slightly soluble in water (20 ppm) but highly soluble in organic solvents. It is a potent skin irritant.