Description

Diisooctyl 3,3'-[(Dimethylstannylene)Bis(Thio)]Dipropionate is a specialized organotin compound that functions as a highly effective heat stabilizer and antioxidant. This product is critical for preventing thermal degradation and maintaining the structural integrity of polymers during high-temperature processing. It is primarily required by manufacturers in the plastics and polymer industries, particularly for stabilizing polyvinyl chloride (PVC) and other halogenated polymers.

Application

• Primary Heat Stabilizer for PVC: Used in rigid and flexible PVC formulations, including pipes, profiles, cables, and films, to prevent dehydrochlorination and discoloration during extrusion and molding.
• Synergistic Stabilizer in Polymer Blends: Often combined with other metal soaps (e.g., calcium/zinc) to enhance thermal stability and longevity in complex polymer systems.
• Lubricant and Processing Aid: Improves the flow properties of polymer melts, reducing processing energy and improving surface finish of the final product.
• Stabilizer for Other Halogenated Polymers: Applicable in chlorinated polyethylene (CPE) and other halogen-containing resins that require protection from heat-induced breakdown.
• Additive for Adhesives and Sealants: Enhances the thermal stability of PVC-based and other adhesive formulations used in construction and automotive applications.

Basic Information

Product Name	Diisooctyl 3,3'-[(Dimethylstannylene)Bis(Thio)]Dipropionate
CAS No.	42378-34-7
Molecular Formula	C28H56O4S2Sn
Molecular Weight	623.6 g/mol
Synonyms	Diisooctyltin bis(isooctylthioglycolate); Diisooctyltin bis(isooctylmercaptoacetate); Dioctyltin bis(isooctylthioglycolate); Dioctyltin bis(isooctylmercaptoacetate); DOTG; Thermoplastic PVC stabilizer; Organotin stabilizer; 3,3'-[(Dimethylstannylene)bis(thio)]bis[propanoic acid] diisooctyl ester
EINECS	255-763-5

Quality Control

Our Diisooctyl 3,3'-[(Dimethylstannylene)Bis(Thio)]Dipropionate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for tin content, purity, and performance characteristics. Certificates of Analysis (COA) are provided with every shipment to guarantee traceability, consistency, and compliance with relevant industry standards.

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 oxidizing agents and heat sources. The product is light-sensitive and should be stored away from direct light exposure.

Specification

Item	Specification
Appearance	Clear, pale yellow to yellow viscous liquid
Identification (IR)	Conforms to structure
Assay (Tin content)	Min. 18.5%
Specific Gravity (20°C)	1.05 - 1.10
Refractive Index (20°C)	1.480 - 1.490
Acidity (as CH3COOH)	Max. 0.1%

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