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Description and features
Dioctyltin Oxide (ViaCat DOTO) is an white powder which has C16H34OSn as chemical formula. It finds its application in aqueous cathodic electrodeposition of urethane coatings for automotive and industrial applications. Further it is an active transesterification catalyst for methacrylate esters that are used in the water treatment market. Besides, DOTO is used in select high temperature transesterification reactions for the production of coating resins and specialty monomeric esters. Lastly, it is being used as intermediate for producing dioctyltin compounds, especially PVC heat stabilizers.

Dioctyltin Oxide is also known as di-n-octyltin oxide, dioctyloxostannane and oxodioctylstannane.

Product information

CAS number870-08-6
EC number 212-791-1
HS code2931 90 80
SensitivityNot hygroscopic

Molecular and structural information

Molecular formulaC16H34OSn
Molecular weight361.15 g/mol
Smiles notationCCCCCCCC[Sn](=O)CCCCCCCC
Structural formula:870-08-6


ViaCat 8201GViaCat 8201P
AppearanceWhite granuleWhite powder
Chlorine content≤0.05 %≤0.05 %
Na+ content≤1.00 % ≤60 ppm
Particle size distribution100 - 400 (D50 μm)10 - 40 (D50 μm)
Tin content≥32.50 %≥32.50 %
Conductivity ≤60 (μS/cm @ 25 ºC)≤60 (μS/cm @ 25 ºC)
Water content≤1.00 % ≤1.00 %

Physicochemical information

Boiling point+/- 230 °C
Density1.340 kg/m3 @ 21.20 ºC
Flash point70.00 °C
Melting point< -20.00 °C @ 1 atm
Partition coefficient (log Pow)9.26
Solubility in waterSlightly soluble (0.23 mg/l) @ 25 ºC
Vapour pressure4.2 x 10^-4 Pa @ 25°C

25 kg carton drums and 1.000 kg jumbo bags
Special packaging is available on request

Shipment Info
Europe and United States: Provided ViaCat DOTO is on stock in our local warehouses our lead time is about one week if delivered in 25 KG drums.
Canada, South America, South Africa and other markets can also be served, please contact our sales department for more details.

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

This substance (CAS: 870-08-6) has been pre-registered under REACH (EC) 1907/2006.

A Material Safety Data Sheets (MSDS) is available for ViaCat DOTO and all other products supplied by Vesta Intracon 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.

Dioctyltin Oxide: Disclaimer. This information is supplied solely for informational purposes and Vesta Intracon 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.