Dioctyltin oxide
CAS 870-08-6
EC 212-791-1
Formula C16H34OSn
MW 361.15 g/mol
Organometallic Compounds Plastics & PolymersCoatings, Adhesives, Sealants & Elastomers CatalysisFlame Retardancy
Description
Dioctyltin oxide (CAS 870-08-6) is an organotin compound commercially available under trade names including Irgastab T 161, Stann OO, and U 800. It carries no assigned E-code and is classified under EC number 212-791-1 with the molecular formula C16H34OSn.
In PVC and polymer processing, dioctyltin oxide functions as a catalyst for esterification and transesterification reactions, accelerating crosslinking and stabilisation at elevated processing temperatures. It is also employed in coating and sealant formulations where its Lewis acid character promotes adhesion chemistry and contributes to flame-retardant performance in certain polymer matrices.
Dioctyltin oxide is supplied as a white to off-white crystalline powder and falls under REACH regulation, requiring registration and SDS compliance for EU trade. Buyers should confirm SVHC status and applicable restrictions under REACH Annex XVII before procurement. Standard packaging formats vary by supplier; consult your account manager for available quantities.
In PVC and polymer processing, dioctyltin oxide functions as a catalyst for esterification and transesterification reactions, accelerating crosslinking and stabilisation at elevated processing temperatures. It is also employed in coating and sealant formulations where its Lewis acid character promotes adhesion chemistry and contributes to flame-retardant performance in certain polymer matrices.
Dioctyltin oxide is supplied as a white to off-white crystalline powder and falls under REACH regulation, requiring registration and SDS compliance for EU trade. Buyers should confirm SVHC status and applicable restrictions under REACH Annex XVII before procurement. Standard packaging formats vary by supplier; consult your account manager for available quantities.
Physical Properties
| Melting Point | 245-248 °C (decomp) |
| Boiling Point | 230°C (1013 hPa) |
| Density | 1.3 g/cm³ |
| Flash Point | 70°C |
| Appearance | white to almost white crystalline powder or |
| Color | White |
| Form | Powder |
| Water Solubility | Insoluble |
| Vapor Pressure | <0.01 hPa (20 °C) |
| Log P | 6 at 20℃ |
Safety & Handling (Learn More)
Danger GHS08
H
H361H371H372H373H413
P
P203P260P264P270P273P280P318P319P405P501P308+P316
Trade & Regulatory
| HS Code | 29310095 |
| UN Number | 3146 |
| Storage Class | 6.1C - Combustible, acute toxic Cat.3 toxic compounds or compounds which causing chronic effects |
| WGK (Germany) | 2 |
Other Names
Dioctyl(oxo)tinDOTOU 800Stann OODioctyloxotinIrgastab T 161dioctyl-tioxideTin, dioctyloxo-DIOCTYL TIN OXIDE
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