Tributyltin oxide

Chembox new
ImageFile = Tributyltin oxide.png ImageSize =
IUPACName =
OtherNames =
Section1 = Chembox Identifiers
CASNo = 56-35-9
PubChem =
SMILES = CCCC [Sn] (CCCC)(O [Sn] (CCCC)(CCCC)CCCC)CCCC.
Section2 = Chembox Properties
Formula = C₂₄H₅₄OSn₂
MolarMass = 596.112
Appearance =
Density =
MeltingPt = -45 °C
BoilingPt = 180 °C
Solubility = 0.002 g/100 mL
Section3 = Chembox Hazards
MainHazards =
FlashPt =
Autoignition =
RPhrases = R21 R22 R23 R25 R36 R37 R38 R48 S35
SPhrases = S36 S37 S39 S45

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, Hexabutylditin, 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 world-wide ban by the International Maritime Organization. It is now considered a severe marine pollutant.

External links

* [http://www.npi.gov.au/database/substance-info/profiles/66.html National Pollutant Inventory Fact Sheet for organotins]
* [http://www.pesticideinfo.org/Detail_ChemUse.jsp?Rec_Id=PC4 Tributyltin oxide use]