|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), or bis(tri-n-butyltin)oxide, is an organotin compound chiefly used as a biocide (fungicide and molluscicide), especially a wood preservative. Its chemical formula is C24H54OSn2. It has the form of a thin, colorless to pale yellow liquid with melting point -45 °C, boiling point 180 °C, and slight water solubility (20 ppm). It is combustible and soluble in organic solvents.
It is available under names AW 75-D, Bio-Met TBTO, Biomet, Biomet 75, BTO, Butinox, C-SN-9, Hexabutyldistannoxane and others.
Tributyltin oxide is a potent skin irritant.
Tributyltin compounds had been used as marine anti-biofouling agents. Concerns over toxicity of these compounds (some reports describe biological effects to marine life at a concentration of 1 nanogram per liter) have led to a worldwide ban by the International Maritime Organization.1 It is now considered a severe marine pollutant and a Substance of very high concern by the EU.
- "Focus on IMO - Anti-fouling systems". International Maritime Organisation.