Description

Diethyl 3,3'-Thiobispropionate is a sulfur-containing diester compound, widely recognized as a key intermediate in the synthesis of antioxidants and light stabilizers. Its primary commercial value lies in its role as a precursor for high-performance additives that protect polymers and plastics from thermal degradation and UV-induced damage. This product is essential for manufacturers in the polymer, plastics, and specialty chemical industries seeking to enhance the durability and lifespan of their materials.

Application

• Primary intermediate for the synthesis of thiodipropionate antioxidants such as Dilauryl Thiodipropionate (DLTDP) and Distearyl Thiodipropionate (DSTDP).
• Key raw material in the production of polymer additives that inhibit thermal oxidation and extend the service life of plastics.
• Used in the formulation of stabilizer packages for polyolefins (e.g., polyethylene, polypropylene) and other synthetic polymers.
• Employed in the manufacture of additives for lubricants and greases to improve their oxidative stability.
• Intermediate in organic synthesis for pharmaceuticals and agrochemicals requiring a thioether linkage.
• Research and development chemical for creating novel sulfur-containing compounds with specific functional properties.

Basic Information

Product Name	Diethyl 3,3'-Thiobispropionate
CAS No.	673-79-0
Molecular Formula	C10H18O4S
Molecular Weight	234.31 g/mol
Synonyms	Diethyl 3,3'-Thiodipropionate; 3,3'-Thiodipropionic Acid Diethyl Ester; Ethyl 3,3'-Thiodipropionate; Diethyl Thiodipropionate; Thiodipropionic Acid Diethyl Ester; Bis(2-ethoxy-2-oxoethyl) Sulfide; Diethyl β,β'-Thiodipropionate; Ethyl Thiodipropionate
EINECS	211-615-7

Quality Control

Our Diethyl 3,3'-Thiobispropionate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including assay, identity confirmation, and impurity profile analysis, to ensure it meets precise specifications for use in sensitive downstream syntheses. Certificates of Analysis (COA) documenting purity, physical properties, and conformance are available upon request to support your quality assurance protocols.

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 acids and incompatible materials such as strong oxidizing agents. The product is compatible with standard organic solvents but should be stored separately from strong acids.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC or HPLC)	≥ 98.0%
Refractive Index (n20D)	1.460 - 1.470
Density (20°C)	1.10 - 1.15 g/mL
Water Content (KF)	≤ 0.5%
Acid Value	≤ 1.0 mg KOH/g

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