Description

3,3'-Thiobis(Propionic Acid Octyl) Ester is a sulfur-containing diester compound, widely recognized as a high-performance antioxidant and stabilizer. Its core value lies in its ability to effectively inhibit oxidative degradation and thermal breakdown in various polymeric systems. This product is essential for manufacturers in the plastics, lubricant, and polymer industries seeking to enhance the longevity and stability of their formulations under demanding conditions.

Application

• Primary antioxidant and stabilizer for polyolefins (e.g., PP, PE) to prevent thermal and oxidative degradation during processing and service life.
• Synergistic additive in lubricant and grease formulations to improve oxidation resistance and extend operational lifespan.
• Stabilizing agent for synthetic rubbers and elastomers to maintain mechanical properties and prevent premature aging.
• Additive in adhesive and sealant formulations to enhance thermal stability and prevent gelation or skin formation.
• Processing aid in polymer masterbatches and compounds to protect against shear-induced degradation.
• Stabilizer for engineering plastics and thermoplastic elastomers (TPEs) requiring long-term heat aging resistance.

Basic Information

Product Name	3,3'-Thiobis(Propionic Acid Octyl) Ester
CAS No.	3006-27-7
Molecular Formula	C22H42O4S
Molecular Weight	402.64 g/mol
Synonyms	Dioctyl 3,3'-Thiodipropionate; Dioctyl Thiodipropionate; DTOP; Thiodipropionic Acid Dioctyl Ester; Antioxidant DTOP; Octyl Thiodipropionate; 3,3'-Thiodipropionic Acid Dioctyl Ester; Dilauryl Thiodipropionate (common industry name)
EINECS	221-110-7

Quality Control

Our production of 3,3'-Thiobis(Propionic Acid Octyl) Ester adheres to stringent quality management protocols to ensure batch-to-batch consistency and high purity. The product is manufactured and tested in compliance with relevant industry standards for polymer additives. A comprehensive Certificate of Analysis (COA), detailing purity, assay, and key physical-chemical parameters, is provided with every shipment to guarantee it meets your specific application requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (typically 15-25°C). Keep away from strong oxidizing agents and heat sources to maintain product integrity.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0 %
Acidity (as Propionic Acid)	≤ 0.1 %
Color (APHA)	≤ 50
Refractive Index (n20D)	1.458 - 1.462
Density (20°C)	0.950 - 0.970 g/cm³
Moisture (KF)	≤ 0.1 %

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