Description

2,2'-[(Dioctylstannylene)Bis(Thio)]Diacetic Acid Dibutyl Ester is a specialized organotin compound that serves as a highly effective stabilizer and catalyst in advanced polymer formulations. Its molecular structure provides exceptional thermal and light stability, making it a critical additive for enhancing the durability and performance of sensitive materials. This product is essential for manufacturers in the plastics, coatings, and specialty chemical industries seeking to improve product longevity and processing efficiency.

Application

• PVC Stabilizer: A primary heat and light stabilizer for rigid and flexible polyvinyl chloride (PVC) products, preventing degradation during processing and extending service life.
• Polymer Catalyst: Used as a catalyst or co-catalyst in polyurethane (PU) and polyester resin synthesis, facilitating controlled polymerization reactions.
• Lubricant Additive: Functions as an anti-wear and extreme pressure (EP) additive in advanced synthetic lubricants and greases.
• Silicone Crosslinking Agent: Acts as a catalyst in the crosslinking (curing) of silicone rubbers and sealants, improving final material properties.
• Coating Formulations: Incorporated into specialty coatings and adhesives to enhance UV resistance and thermal stability.
• Organic Synthesis Intermediate: Serves as a key intermediate for synthesizing more complex organotin compounds and thioglycolate derivatives.

Basic Information

Product Name	2,2'-[(Dioctylstannylene)Bis(Thio)]Diacetic Acid Dibutyl Ester
CAS No.	27107-88-6
Molecular Formula	C28H56O4S2Sn
Molecular Weight	647.63 g/mol
Synonyms	Dioctyltin Bis(Isooctyl Thioglycolate); Dioctyltin Bis(2-Ethylhexyl Thioglycolate); Dioctyltin Bis(Isooctylmercaptoacetate); DOTG; Dioctyltin Di(iso-octylthioglycollate); Stabilizer T-250; Stanclere T-250; Advastab TM-692; Tinuvin 123 (related class); EINECS 248-230-0
EINECS	248-230-0

Quality Control

Our production of 2,2'-[(Dioctylstannylene)Bis(Thio)]Diacetic Acid Dibutyl Ester adheres to stringent quality management protocols. Every batch undergoes rigorous analytical testing, including assay, identification, and impurity profiling, to ensure consistent purity and performance that meets or exceeds industry specifications. A comprehensive Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and compliance.

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 / 59-77°F). Keep away from heat sources, open flames, and incompatible materials such as strong oxidizing agents. For long-term storage, consider using an inert atmosphere to maintain optimal stability.

Specification

Item	Specification
Appearance	Clear, pale yellow to yellow liquid
Identification (IR)	Conforms to structure
Assay (Tin content)	≥ 18.0 %
Purity (HPLC)	≥ 95.0 %
Specific Gravity (20°C)	1.05 - 1.10
Refractive Index (20°C)	1.490 - 1.510
Heavy Metals (as Pb)	≤ 10 ppm

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