Description

Diisooctyl 3,3'-Thiobispropionate is a high-performance sulfur-based antioxidant and stabilizer widely used in polymer manufacturing. This compound is valued for its ability to effectively inhibit thermal and oxidative degradation, thereby extending the service life of finished products. It is an essential additive for industries requiring durable plastics and elastomers, such as packaging, automotive, and wire & cable production.

Application

• Primary antioxidant and stabilizer in polyolefins (PP, PE) and other polymers.
• Protects synthetic rubbers and elastomers from heat aging during processing and use.
• Used in adhesives and sealants to maintain consistency and performance.
• Stabilizer component in lubricants and greases to prevent oxidation.
• Additive for wire and cable insulation materials to ensure long-term stability.
• Contributes to the longevity of packaging films and molded plastic articles.
• Synergistic component in stabilizer systems for enhanced performance.

Basic Information

Product Name	Diisooctyl 3,3'-Thiobispropionate
CAS No.	26655-40-3
Molecular Formula	C22H42O4S
Molecular Weight	402.6 g/mol
Synonyms	Bis(2-methylpropyl) 3,3'-thiobispropanoate; Diisobutyl 3,3'-thiobispropionate; Dioctyl thiodipropionate; DIOCTYLATED THIODIPROPIONATE; Thiodipropionic acid diisooctyl ester; Antioxidant DSTDP (common industry name); 3,3'-Thiobispropanoic acid diisooctyl ester; Dilauryl thiodipropionate (related compound, often listed as synonym)
EINECS	247-889-0

Quality Control

Our Diisooctyl 3,3'-Thiobispropionate is manufactured under a stringent quality management system to ensure batch-to-batch consistency and high purity. The product is tested against rigorous internal specifications to meet the demands of industrial applications. A Certificate of Analysis (COA) detailing purity, identity, and key physical parameters is provided with each shipment.

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 heat sources and incompatible materials. Under these conditions, the product has an excellent shelf life.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Acidity (as Thiobispropionic Acid)	≤ 0.05 %
Color (APHA)	≤ 50
Refractive Index (n20D)	1.468 - 1.472
Specific Gravity (20/20°C)	0.960 - 0.980

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