Description

Dioctadecanoic Acid Thiobis(2,1-Ethanediyl) Ester is a high-purity organosulfur compound, specifically a thioester of stearic acid. This specialty chemical serves as a versatile intermediate and functional additive, valued for its ability to modify material properties and participate in controlled chemical synthesis. It is primarily sought by manufacturers in the polymer, lubricant, and specialty chemical industries for applications requiring sulfur-based functionality or long-chain fatty acid modification.

Application

• Polymer Additive: Acts as a plasticizer, stabilizer, or cross-linking agent in specialty polymer formulations, including PVC and synthetic rubbers.
• Lubricant & Grease Component: Used as an extreme pressure (EP) additive or viscosity modifier in high-performance industrial lubricants and greases.
• Chemical Intermediate: Serves as a key building block in the synthesis of more complex surfactants, emulsifiers, and corrosion inhibitors.
• Surface Treatment Agent: Imparts hydrophobic or specific release properties when used in coatings, mold release agents, or textile treatments.
• Research & Development: Employed in academic and industrial R&D for studying thioester chemistry and developing novel materials.

Basic Information

Product Name	Dioctadecanoic Acid Thiobis(2,1-Ethanediyl) Ester
CAS No.	4275-32-5
Molecular Formula	C38H74O4S
Molecular Weight	626.1 g/mol
Synonyms	Bis(2-hydroxyethyl) sulfide distearate; 2,2'-Thiodiethanol distearate; Diethylene glycol dithiodistearate; Distearic acid ester with thiodiglycol; Thiobis(2,1-ethanediyl) dioctadecanoate; Thiodiglycol distearate; Stearic acid, diester with thiodiglycol; 4275-32-5
EINECS	224-268-8

Quality Control

Our production of Dioctadecanoic Acid Thiobis(2,1-Ethanediyl) Ester adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency meet defined specifications. We provide full traceability and Certificates of Analysis (COA) are available for all commercial shipments to support your quality assurance and regulatory compliance needs.

Storage

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

Specification

Item	Specification
Appearance	White to off-white waxy solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Melting Point	Contact for details
Acid Value	≤ 2.0 mg KOH/g
Heavy Metals (as Pb)	≤ 10 ppm

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