Description

Ethylene Glycol Bis(3-Mercaptopropionate) is a high-purity, difunctional thiol compound widely used as a chain transfer agent and crosslinking modifier. Its core value lies in its ability to efficiently regulate polymer molecular weight and introduce thiol functionality for subsequent reactions, enabling precise control over material properties. This product is essential for manufacturers in the polymer, adhesive, and specialty chemical industries seeking to enhance product performance and process efficiency. CAS No. 22504-50-3.

Application

• Polymer Synthesis: Acts as a highly effective chain transfer agent (CTA) in free-radical polymerization of acrylates, methacrylates, and styrenics to control molecular weight and polydispersity.
• Thiol-Ene Chemistry: Serves as a key difunctional monomer in UV-curable thiol-ene click reactions for producing coatings, adhesives, and optical materials with low shrinkage and high conversion.
• Epoxy Resin Modification: Used as a flexibilizer and curing agent for epoxy resins, improving impact resistance and reducing brittleness in composite and adhesive formulations.
• Crosslinking Agent: Facilitates the formation of polymer networks in rubber and elastomer production, enhancing thermal stability and mechanical properties.
• Surface Modification: Provides a thiol-functional anchor for grafting onto metal or polymer surfaces to alter wettability, adhesion, or biocompatibility.
• Pharmaceutical Intermediates: Employed in the synthesis of drug candidates and biomaterials where precise thiol incorporation is required.

Basic Information

Product Name	Ethylene Glycol Bis(3-Mercaptopropionate)
CAS No.	22504-50-3
Molecular Formula	C8H14O4S2
Molecular Weight	238.32 g/mol
Synonyms	EGBMP; 1,2-Ethanediol Bis(3-mercaptopropionate); Ethylene Glycol Di(3-mercaptopropionate); 3-Mercaptopropionic Acid Ethylene Ester; Bis(3-mercaptopropionyloxy)ethane; 2-Hydroxyethyl 3-Mercaptopropionate Dimer; Glycol Bis(β-mercaptopropionate); Thiol-terminated Ethylene Glycol Ester
EINECS	Contact for details

Quality Control

Our Ethylene Glycol Bis(3-Mercaptopropionate) is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes rigorous analytical testing, including assay by titration and impurity profiling by gas chromatography (GC). Certificates of Analysis (COA) detailing purity, identity, and specific test results are provided with every shipment 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 15-25°C under an inert atmosphere (e.g., nitrogen) to prevent oxidation. Keep away from strong oxidizing agents, strong bases, and sources of heat. Due to its thiol functionality, prolonged exposure to air should be minimized.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to reference spectrum
Assay (GC)	≥ 98.0 %
Water Content (KF)	≤ 0.5 %
Refractive Index (n20D)	1.510 - 1.520
Density (20°C)	1.22 - 1.28 g/mL

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