Description

Dioctyltin Oxide CAS NO 870-08-6 is a versatile organotin compound widely utilized as a catalyst and stabilizer in industrial polymer chemistry. Its primary value lies in its exceptional catalytic efficiency for polyurethane (PU) and silicone elastomer production, enabling faster reaction times and improved product performance. This high-purity intermediate is essential for manufacturers in the plastics, coatings, and specialty chemical sectors seeking reliable and consistent raw materials.

Application

• Polyurethane Catalyst: A key catalyst for the production of flexible and rigid polyurethane foams, elastomers, and coatings, promoting the reaction between isocyanates and polyols.
• Silicone Crosslinking Agent: Used as a catalyst in condensation-cure silicone rubber (RTV) systems to facilitate room-temperature vulcanization.
• PVC Stabilizer Intermediate: Serves as a crucial precursor in the synthesis of more complex dialkyltin carboxylates and mercaptides used as heat stabilizers for PVC.
• Esterification & Transesterification Catalyst: Employed in organic synthesis to catalyze esterification and transesterification reactions for producing plasticizers, lubricants, and biodiesel.
• Adhesive & Sealant Formulations: Incorporated into high-performance adhesives and sealants to enhance curing characteristics and final material properties.
• Specialty Polymer Synthesis: Acts as a catalyst in the synthesis of polyesters and other condensation polymers.

Basic Information

Product Name	Dioctyltin Oxide
CAS No.	870-08-6
Molecular Formula	C16H34OSn
Molecular Weight	377.15 g/mol
Synonyms	Bis(octyl)tin oxide; Di-n-octyltin oxide; Dioctylstannane oxide; Octyltin oxide; Stannane, dioctyloxo-; DOTnO; OTO; Catalyst T-9 (related trade name); Thermolite 890 (related trade name)
EINECS	212-779-0

Quality Control

Our Dioctyltin Oxide is manufactured under stringent quality management systems to ensure batch-to-batch consistency and high purity. Each lot is analyzed against rigorous internal specifications, which typically include assay (Tin content), identification, and impurity profiling. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). Keep away from strong acids and oxidizing agents. For long-term storage, consider an inert atmosphere to maintain optimal quality.

Specification

Item	Specification
Appearance	White to off-white powder or flakes
Identification (IR)	Conforms
Assay (Sn content)	≥ 31.0 %
Melting Point	Contact for details
Loss on Drying	≤ 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.