Dibutyltin Dilaurate
DBTDL, Dibutyltin didodecanoate, Butyltin dilaurate, DBTL.
- CAS
- 77-58-7
- EC
- 201-039-8
- Sectors
- Plastics & Polymers, Rubber & Elastomers, Coatings, Adhesives, Sealants & Elastomers
Dibutyltin Dilaurate (CAS 77-58-7) is an organotin compound supplied as a clear pale yellow oily liquid, used as a catalyst for polyurethane production and silanol condensation and as a secondary heat stabilizer for PVC. It is typically supplied in Technical Grade to ensure optimal reactivity in moisture-cured systems and industrial coatings.
This liquid additive is valued for its excellent thermal stability and ability to accelerate the gelation process in flexible and rigid foams. It acts as a primary curing agent in RTV silicone formulations, providing precise control over setting times and final structural integrity.
In the plastics industry, it functions as a secondary heat stabilizer for PVC, preventing degradation during high-temperature extrusion. Its high purity levels facilitate the production of clear, non-yellowing resins and high-performance automotive sealants.
Typical Properties
| Molecular formula | C32H64O4Sn |
|---|---|
| Molecular weight | 631.56 g/mol |
| Appearance | yellow liquid |
| Form | Oily Liquid |
| Color | Clear pale yellow |
| Melting point | 22-24 °C |
| Boiling point | 205 °C @ Press: 9.8 Torr |
| Density | 1.05 g/cm³ @ Temp: 20 °C |
| Water solubility | <0.1 g/100 mL at 20 °C |
| Flash point | >230 °F |
| GHS signal word | Danger · Corrosive, Acute toxicity, Irritant / harmful, Health hazard, Environmental hazard |
| HS code | 29319090 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Dibutyltin Dilaurate
Applications
- Polyurethane Catalysis: Accelerates the reaction between polyols and isocyanates in the production of foams, elastomers, and high-performance coatings.
- Silicone Crosslinking: Serves as a vital catalyst for curing room-temperature vulcanizing (RTV) silicone rubbers used in construction sealants.
- PVC Stabilization: Enhances the heat resistance of polyvinyl chloride during processing, ensuring color retention and mechanical strength in finished products.
Safety & Risks
Classified as a Reproductive Toxicant (Cat 1B) and causing Skin Sensitization. It poses a Serious Eye Damage risk and is Toxic to Aquatic Life. Always wear PPE including chemical-resistant gloves, safety goggles, and respiratory protection.
Packaging
Standard industrial formats include 25 kg Plastic Drums, 200 kg Steel Drums, and 1,000 kg IBC Tanks.