Dibutyltin dichloride
CAS 683-18-1
EC 211-670-0
Formula C8H18Cl2Sn
MW 303.84 g/mol
Organometallic Compounds Plastics & PolymersCoatings, Adhesives, Sealants & ElastomersPrinting & Packaging CatalysisAntioxidant & StabilizerPolymerization Initiation
Description
Dibutyltin dichloride (CAS 683-18-1, EC 211-670-0) is an organotin compound also referenced under the names dichlorodibutyltin, dibutyltin chloride, and NSC 2604. It carries no assigned E-code and is classified within the organometallic compounds category.
In PVC stabilization, dibutyltin dichloride interrupts thermal degradation by displacing labile chloride ions before discoloration occurs. It also functions as a catalyst in polyurethane and silicone polymerization, accelerating crosslinking reactions at controlled rates. These mechanisms make it relevant to coatings, sealants, and printing substrate formulations.
Dibutyltin dichloride is supplied as a white to beige crystalline solid and is subject to REACH registration requirements within the European Union. Procurement teams should confirm supplier SDS documentation and substance authorization status given the regulatory scrutiny applied to organotin compounds. Standard packaging formats vary by supplier volume tier.
In PVC stabilization, dibutyltin dichloride interrupts thermal degradation by displacing labile chloride ions before discoloration occurs. It also functions as a catalyst in polyurethane and silicone polymerization, accelerating crosslinking reactions at controlled rates. These mechanisms make it relevant to coatings, sealants, and printing substrate formulations.
Dibutyltin dichloride is supplied as a white to beige crystalline solid and is subject to REACH registration requirements within the European Union. Procurement teams should confirm supplier SDS documentation and substance authorization status given the regulatory scrutiny applied to organotin compounds. Standard packaging formats vary by supplier volume tier.
Physical Properties
| Melting Point | 43 °C |
| Boiling Point | 135 °C @ Press: 10 Torr |
| Density | 1.4 |
| Flash Point | >230 °F |
| Appearance | white to beige crystalline low melting mass |
| Color | White |
| Form | Crystalline |
| Water Solubility | 320 mg/L, hydrolises in hot water |
| Vapor Pressure | 0.0016 hPa (25 °C) |
| Refractive Index | 1.4991 |
Safety & Handling (Learn More)
Danger GHS05 GHS06 GHS08 GHS09 GHS07
H
H301H312H314H317H318H330H341H360H370H372H400H410
P
P203P260P261P264P270P271P272P273P280P284P316P317P318P319P320P321P330P363P391P405P501P264+P265P301+P316P302+P352P304+P340P308+P316P333+P317P362+P364P403+P233P301+P330+P331P302+P361+P354P305+P354+P338
Trade & Regulatory
| HS Code | 29310095 |
| UN Number | 2928 |
| ADR Class | 6.1 |
| Packing Group | II |
| Storage Class | 6.1A - Combustible acute toxic Cat. 1 and 2 very toxic hazardous materials |
| WGK (Germany) | 3 |
Other Names
dibutyl(dichloro)stannaneDibutyldichlorotinDichlorodibutyltinDibutyltin chlorideDI-N-BUTYLDICHLOROTINDIBUTYLDICHLOROTIN(+4)
Related Products
Raw Materials
Derivatives
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