Description

2-Mercaptoethyl 3-Mercaptopropionate is a versatile dithiol compound, primarily valued for its dual thiol functionality which makes it a highly effective chain transfer agent and cross-linking precursor. This compound is essential in polymer chemistry, where it enables precise control over molecular weight and facilitates the formation of robust polymer networks. It is a critical material for manufacturers in the polymer, adhesive, and specialty chemical industries seeking to enhance product performance and stability.

Application

• As a chain transfer agent (CTA) in free-radical polymerization for controlling molecular weight and polydispersity.
• As a key cross-linking agent and monomer in the synthesis of thiol-ene polymers and networks.
• In the production of optical resins and high-refractive-index materials for lenses and coatings.
• As a modifier for epoxy resins, improving flexibility and chemical resistance.
• In the formulation of sealants and adhesives requiring high strength and durability.
• As an intermediate for synthesizing pharmaceuticals and agrochemicals.
• For surface modification and as a ligand precursor in metal coordination chemistry.

Basic Information

Product Name	2-Mercaptoethyl 3-Mercaptopropionate
CAS No.	59970-59-1
Molecular Formula	C6H10O2S2
Molecular Weight	178.27 g/mol
Synonyms	3-Mercaptopropionic Acid 2-Mercaptoethyl Ester; 2-Mercaptoethyl 3-Mercaptopropanoate; Ethylene Glycol Bis(3-mercaptopropionate); Bis(3-mercaptopropionyloxy)ethane; 1,2-Ethanediyl Bis(3-mercaptopropionate); Dithiol Monomer; EGMP; EGDMP
EINECS	261-980-1

Quality Control

Our 2-Mercaptoethyl 3-Mercaptopropionate is manufactured under strict quality management systems to ensure batch-to-batch consistency and high purity. Each lot undergoes comprehensive analytical testing, including assay, impurity profiling, and identity confirmation. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee compliance with your technical requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This material is easily oxidized; for long-term storage, an inert atmosphere (nitrogen or argon) is recommended. Keep away from strong oxidizing agents, strong bases, and sources of ignition.

Specification

Item	Specification
Appearance	Colorless to pale yellow liquid
Identification (IR)	Conforms to structure
Assay (GC)	≥ 98.0%
Water Content (KF)	≤ 0.5%
Refractive Index (n20/D)	1.520 - 1.530
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.