Description

Diisooctyl 3,3'-Dithiobispropionate is a high-performance sulfur-containing antioxidant and stabilizer widely used in polymer processing. Its primary function is to protect plastics and elastomers from thermal degradation and oxidative stress during high-temperature manufacturing and long-term service. This compound is essential for manufacturers in the plastics, rubber, and lubricant industries seeking to enhance product durability and lifespan.

Application

• Polymer Stabilization: Acts as a secondary antioxidant and metal deactivator in polyolefins (PP, PE), PVC, and engineering plastics to prevent thermal and oxidative degradation during processing and end-use.
• Rubber Industry: Used as a non-discoloring stabilizer in synthetic rubbers and latex to maintain elasticity and prevent aging caused by heat and oxygen.
• Lubricant & Grease Additive: Functions as an antioxidant in synthetic lubricants and industrial greases, extending their operational life by inhibiting oil thickening and deposit formation.
• Adhesive & Sealant Formulations: Incorporated to improve the thermal stability and longevity of hot-melt adhesives and polysulfide-based sealants.
• Wire & Cable Insulation: Protects the polymer insulation of electrical wires and cables from copper-catalyzed degradation at elevated temperatures.
• Food Contact Materials (indirect): May be used in stabilizer systems for polymers intended for indirect food contact applications, subject to relevant regulatory compliance.

Basic Information

Product Name	Diisooctyl 3,3'-Dithiobispropionate
CAS No.	33881-78-6
Molecular Formula	C30H58O4S2
Molecular Weight	546.9 g/mol
Synonyms	Bis(3-(dioctylthio)propyl) thiodipropionate; Dioctyl thiodipropionate; DTOP; DTOP; Thiodipropionic acid diisodecyl ester; Antioxidant DTOP; 3,3'-Thiobispropanoic acid diisodecyl ester; Dilauryl thiodipropionate (related analog)
EINECS	251-709-0

Quality Control

Our Diisooctyl 3,3'-Dithiobispropionate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, color, and performance. Certificates of Analysis (COA) documenting key parameters are provided with every shipment to guarantee traceability and consistency for your production processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from heat sources and incompatible materials such as strong oxidizing agents. Recommended storage temperature is between 15°C and 25°C (59°F and 77°F). Keep the container sealed when not in use to minimize moisture absorption.

Specification

Item	Specification
Appearance	Clear, pale yellow to yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Color (Gardner)	≤ 4
Acid Value	≤ 1.0 mg KOH/g
Refractive Index (20°C)	1.468 - 1.478
Density (20°C)	0.930 - 0.950 g/cm³
Flash Point	> 200 °C

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