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Cas 753-73-1 /Dimethyltin dichloride, molecular formula C₂H₆Cl₂Sn, molecular weight 199.67. It appears as white crystals, is hygroscopic, and undergoes rapid exothermic hydrolysis upon contact with water to produce hydrogen chloride. It is soluble in organic solvents such as alcohols, ethers and benzene, but insoluble in cold water. It is chemically reactive, readily reacts with alcohols, acids and amines, and has moderate thermal stability. As an organotin compound, it is toxic and irritating to the skin and eyes, and should be stored sealed and dry.
| Item | Specification |
| Melting Point | 165-200℃ |
| Boiling Point | 745.1±70.0℃（760 mmHg） |
| Density | 1.4-1.444 g/cm³ |
| Flash point | 404.4±35.7℃ |
| Pka | 1.84±0.10 |
| Vapor pressure | 0.0 ± 2.6 mmHg (25 °C) |
| Solubility | Insoluble in water and common organic solvents; soluble in alkaline solutions |
| Solubility | Stable; store in a sealed container away from light |
Organic Synthesis Intermediate：Dimethyltin dichloride is used in the synthesis of dimethyltin oxide, dimethyltin mercaptoester and other organotin derivatives, serving as an important organotin raw material.
Preparation of PVC Heat Stabilizers：Mainly used in the production of methyltin heat stabilizers, which are widely applied in the processing of rigid PVC products to improve heat resistance and processing stability.
Catalyst：Dimethyltin dichloride is used as a catalyst for esterification and polycondensation reactions in the synthesis of polymer materials such as polyesters and polyurethanes.
Glass and Surface Treatment：Dimethyltin dichloride is used as a precursor for glass coating, and also for preparing anti-corrosion and antistatic coatings to enhance surface properties of materials.
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