Description and features

ViaCat 4201 (Dibutyltin Oxide) is a white powder which has C8H18OSn as chemical formula. The main applications of DBTO are coatings for automotive and industrial applications (aqueous cathodic electrodeposition) and PVC stabilizers. Further it finds its application as intermediate to produce other organotin compounds like dibutyltin dilaurate. Lastly, it us used in select high temperature transesterification reactions for the production of alkyd resins and powder coating resins.

Dibutyltin Oxide is also known as dibutyl(oxo)tin and Dibutyltin(IV) oxide.


Europe: Provided ViaCat 4201 (DBTO) is on stock in our local warehouses our lead time is about one week if delivered in 25 KG steel drums.

United States, Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.

This substance (CAS: 78-67-1) has been registered under REACH (EC) 1907/2006.

Product Identification

CAS number 818-08-6
EC number 212-449-1
HS code 2931 90 00
IUPAC Name Dibutylstannanone


Appearance White powder
Tin 47.50 +/- 0.50 %
Iron ≤0.003 %
Sodium chloride ≤0.05 %
Volatile matter ≤0.40 %


Available packaging: 25 KG fiber drums.
Special packaging is available on request.


Store Dibutyltin Oxide in a cool, dry and well-ventilated area and in line with legal requirements.
Keep DBTO away from heat sources and oxidizing agents.


A Material Safety Data Sheets (MSDS) is available for ViaCat 4201 (DBTO) and all other products supplied by Vesta Chemicals BV.

An MSDS describes the hazards of a product and explains how a product can be safely handled, used and stored. Besides it provides important regulatory and emergency response information for the purchased product.

Molecular and structural information

Molecular formula C8H18OSn
Molecular weight 248.94 g/mol
Smiles notation CCCC[Sn](=O)CCCC
Structural formula 818-08-6

Physicochemical information

Boiling point 161.90 °C
Density 1.58 g/cm3 @ 20 ºC
Flash point No data available
Melting point 105 °C
log Kow5.33 @ 20 °C
olubility in water Insoluble (< 0.1 mg/l)
Vapour pressure 4×10-6 Pa @ 25°C
Dibutyltin Oxide | CAS: 808-08-6 | Disclaimer. This information is supplied solely for informational purposes and Vesta Chemicals bv makes no guarantees or warranties, either expressed or implied, with respect to the accuracy and use of this data. All product warranties and guarantees shall be governed by the Standard Terms of Sale. Nothing in this document is legal advice or is a substitute for competent legal advice.