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Dioctyltin oxide; DOTO

Dibutyltin Oxide;DBTO
equal to FASCAT 4201

CAS:818-08-6

Synonyms:
Dibutyl(oxo)tin;
Tin,dibutyloxo;
Dibutyloxostannane;
Dibutyloxide of tin;
Dibutylstannane oxide;
Stannane,dibutyloxo;
Dibutyloxotin;
Di-n-butyltin Oxide

Properties
Chemical formula:C8H18OSn
M.W.:248.92
Density:1.6 g/cm3
Melting point:> 300 °C (572 °F; 573 K) (decomposes 210 °C)

Specification
Appearance:White solid
Sn:47.5±0.5%
Cl:≤0.3%
Moisture:≤1.0%

Application:
Dibutyltin oxide, or dibutyloxotin, is an organotin compound with the chemical formula (C4H9)2SnO.
It is a colorless solid that, when pure, is insoluble in organic solvents.
It is used as a reagent and a catalyst, particularly useful in directing regioselective O-alkylation, acylation, and sulfonation reactions for diols and polyol.
DBTO has been used in the regioselective tosylation (a specific type of sulfonation) of certain polyols to selectively tosylate primary alcohols and exocyclic alcohols over more sterically-hindered alcohols.
Dibutyltin compounds, such as dibutyltin dilaurate are widely used curing catalysts for the production of silicones and polyurethanes.
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