Description

Tri-n-Butyltin Stearate is an organotin compound that functions as a highly effective heat stabilizer and catalyst in polymer systems. This product is critical for manufacturers requiring enhanced thermal processing stability and controlled catalytic activity in their formulations. It is primarily utilized by the plastics and polymer industries, especially in the production of PVC and other halogenated polymers, where it prevents degradation during high-temperature processing.

Application

• PVC Stabilizer: Acts as a primary or co-stabilizer to prevent thermal degradation and discoloration during the extrusion and molding of rigid and flexible PVC products.
• Polymer Catalyst: Serves as a catalyst in polyurethane (PU) foam formation and other polycondensation reactions.
• Wood Preservative: Used as a biocide component in formulations to protect wood from fungal and insect attack.
• Antifouling Agent: A key active ingredient in marine antifouling paints to prevent the growth of barnacles and algae on ship hulls.
• Silicone Curing Agent: Facilitates the room-temperature vulcanization (RTV) of silicone rubbers and sealants.
• Glass Coating Additive: Imparts water-repellent and anti-static properties to glass surfaces.

Basic Information

Product Name	Tri-n-Butyltin Stearate
CAS No.	4027-13-8
Molecular Formula	C30H62O2Sn
Molecular Weight	581.51 g/mol
Synonyms	Stannane, tributyl(1-oxooctadecyloxy)-; Tributyltin stearate; TBTS; Tin, tributyl(stearoyloxy)-; Octadecanoic acid, tributylstannyl ester; NSC 175087; Bis(tributyltin) stearate (common trade name); Tributylstannyl stearate
EINECS	223-700-6

Quality Control

Our Tri-n-Butyltin Stearate is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including assay by titration and impurity profiling, to ensure it meets precise specifications for tin content and purity. Certificates of Analysis (COA) are provided with every shipment, and we support compliance with relevant global regulatory frameworks, including REACH.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). This compound is easily oxidized and should be stored under an inert atmosphere (e.g., nitrogen) for long-term preservation. Keep away from strong oxidizing agents and acids.

Specification

Item	Specification
Appearance	White to pale yellow waxy solid or liquid
Identification (IR)	Conforms to structure
Assay (Tin Content)	Min. 20.0%
Acid Value	≤ 2.0 mg KOH/g
Water Content	≤ 0.5%
Heavy Metals (as Pb)	≤ 10 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.