Dibutyltin dilaurate

Dibutyltin Dilaurate (DBTDL) is a high-efficiency organotin catalyst primarily used in the production of polyurethanes (PU), including foams, coatings, and adhesives. It functions by accelerating the reaction between isocyanates and polyols. Additionally, it serves as a heat stabilizer for PVC (polyvinyl chloride) and a catalyst for the cross-linking of silane-modified polymers and RTV silicone rubbers.

Buyers must verify the Tin (Sn) content, which typically ranges between 18.0% and 19.0% for high-purity grades. Other critical parameters include color (APHA ≤ 100), moisture content (< 0.5%), and viscosity. For specific applications like clear coatings, a low-color, high-clarity liquid is essential to prevent yellowing of the final product.

As an organotin compound, DBTDL is subject to strict regulations. It is classified as a hazardous material (typically Class 6.1 or Class 9 depending on concentration and jurisdiction). Suppliers must provide a Safety Data Sheet (SDS) compliant with GHS standards. In the EU, buyers must ensure compliance with REACH regulations, as certain organotins are restricted in consumer goods.

DBTDL is sensitive to moisture and air. It should be stored in tightly sealed, original containers in a cool, dry, and well-ventilated area. The typical shelf life is 12 to 24 months. If exposed to low temperatures, it may crystallize or thicken; however, it can usually be restored by gentle heating and stirring without losing catalytic activity.

Since DBTDL is often classified as a Dangerous Good (DG) for transport, it requires UN-approved packaging (usually steel drums or IBC tanks). Buyers must ensure the supplier provides a Dangerous Goods Declaration and uses a freight forwarder certified to handle IMO (Ocean) or IATA (Air) hazardous shipments. Shipping to countries with strict environmental laws may require additional import permits.

To ensure transaction security, utilize the Secured Trading services on Made-in-China.com. Always request a Certificate of Analysis (COA) for each batch before shipment. For large-scale orders, it is highly recommended to hire a third-party inspection agency (like SGS or Intertek) to perform a pre-shipment inspection to verify the chemical composition and packaging integrity.

Pricing for DBTDL is heavily influenced by the global market price of Tin. Buyers should monitor tin commodity trends to time their purchases. Negotiate based on volume tiers; for example, purchasing in full container loads (FCL) can reduce unit costs by 10-15% compared to LCL. Long-term supply contracts can also lock in more stable pricing against market volatility.

The most common pitfall is misdeclaration of goods to avoid hazardous shipping fees, which can lead to heavy fines or seizure by customs. Another risk is product degradation due to poor sealing during transit. Ensure the contract specifies that the moisture content must be tested at the port of loading to prevent receiving inactive catalysts.