|Jmol-3D images||Image 1|
|Melting point||-45 °C|
|Boiling point||180 °C at 2 mm Hg|
|Solubility in water||0.002 g/100 mL|
|R-phrases||R21 R25 R36/38 R48/23/25 R50/53|
|S-phrases||S36/37/39 S45 S60 S61|
|Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)|
|(what is: / ?)|
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.
Tributyltin compounds had been used as marine anti-biofouling agents. Concerns over toxicity of these compounds have led to a worldwide ban by the International Maritime Organization. It is now considered a severe marine pollutant and a Substance of very high concern by the EU.