Description

2,2-Dioctyl-1,3,2-Oxathiastannolan-5-One is a specialized organotin compound that serves as a highly effective stabilizer and catalyst in polymer chemistry. Its unique structure provides excellent thermal and light stability, making it a critical additive for enhancing the durability and performance of various synthetic materials. This product is essential for manufacturers in the plastics, coatings, and specialty chemical industries seeking to improve product longevity and processing characteristics.

Application

• Primary heat stabilizer for polyvinyl chloride (PVC) and other halogenated polymers.
• Key component in light stabilization systems for outdoor plastics and coatings to prevent UV degradation.
• Used as a catalyst in polyurethane (PU) foam production and other condensation polymerization reactions.
• Employed in the formulation of high-performance lubricants and greases as an additive.
• Acts as a stabilizing agent in silicone rubber and other elastomers.
• Utilized in wood preservative formulations and antifouling paint systems.

Basic Information

Product Name	2,2-Dioctyl-1,3,2-Oxathiastannolan-5-One
CAS No.	15535-79-2
Molecular Formula	C18H36O2SSn
Molecular Weight	427.24 g/mol
Synonyms	Dioctyltin oxathiastannolanone; 2,2-Dioctyl-5-oxo-1,3,2-oxathiastannolane; Dioctyltin oxathiastannolane derivative; Organotin stabilizer 15535-79-2; Tin-based heat stabilizer; Oxathiastannolane, 2,2-dioctyl-5-oxo-; Dioctyltin mercaptoacetate cyclic ester (related structure); EINECS 239-622-4
EINECS	239-622-4

Quality Control

Our production of 2,2-Dioctyl-1,3,2-Oxathiastannolan-5-One adheres to stringent quality management protocols. Every batch is analyzed to ensure it meets precise chemical and physical specifications, with a focus on consistent purity and performance. Certificates of Analysis (COA) documenting key parameters such as assay, tin content, and impurity profiles are available upon request to support your quality assurance processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from strong oxidizing agents and incompatible materials. Due to its light-sensitive nature, containers should be opaque or stored in darkness.

Specification

Item	Specification
Appearance	Clear to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (Tin content)	≥ 27.5 %
Purity (HPLC)	≥ 95.0 %
Specific Gravity (20°C)	1.10 - 1.20
Refractive Index (20°C)	1.490 - 1.510

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