Description

1,4-Butanediol Bis(3-Mercaptopropionate) is a high-purity, sulfur-containing di-functional monomer widely used as a chain transfer agent and crosslinking modifier in advanced polymer synthesis. Its core value lies in its ability to efficiently control polymer molecular weight and introduce thiol functional groups, enabling the production of materials with tailored mechanical properties and enhanced stability. This compound is essential for manufacturers in the polymer, adhesive, and specialty coatings industries seeking to develop high-performance, customizable materials.

Application

• Polymer Synthesis & Modification: Acts as a highly effective chain transfer agent (CTA) in free-radical polymerization to control molecular weight and polydispersity.
• Thiol-Ene Chemistry: Serves as a key di-thiol component in photo-initiated or thermal thiol-ene click reactions for creating crosslinked networks in coatings, adhesives, and hydrogels.
• Adhesive Formulations: Used as a crosslinker and modifier to enhance the toughness, flexibility, and curing characteristics of polyurethane and epoxy-based adhesives.
• Optical Materials: Employed in the synthesis of high-refractive-index polymers and optical resins due to the high sulfur content.
• Coatings & Sealants: Imparts improved weatherability, chemical resistance, and adhesion properties to industrial and protective coatings.
• Pharmaceutical Intermediates: Utilized as a building block in the synthesis of certain active pharmaceutical ingredients (APIs) and drug delivery systems.

Basic Information

Product Name	1,4-Butanediol Bis(3-Mercaptopropionate)
CAS No.	92140-97-1
Molecular Formula	C10H18O4S2
Molecular Weight	266.38 g/mol
Synonyms	1,4-Butylene Glycol Bis(3-mercaptopropionate); Bis(3-mercaptopropionyloxy)butane; 1,4-Bis(3-mercaptopropionyloxy)butane; Butanediol Dimercaptopropionate; BDMP; 1,4-Butanedithiol Dipropionate; 3-Mercaptopropionic Acid 1,4-Butanediol Ester; Thiol-terminated 1,4-Butanediol Propionate
EINECS	Contact for details

Quality Control

Our 1,4-Butanediol Bis(3-Mercaptopropionate) is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and performance. Certificates of Analysis (COA) detailing key parameters such as assay, thiol content, and impurity profiles are provided with every shipment to guarantee consistent quality and supply reliability for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area under an inert atmosphere (e.g., nitrogen) to prevent oxidation. Recommended storage temperature is 2-8°C for long-term stability. Keep away from heat, sparks, open flames, and strong oxidizing agents.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms to structure
Assay (GC or HPLC)	≥ 98.0%
Thiol Content	≥ 11.8 meq/g
Water Content (KF)	≤ 0.1%
Refractive Index (n20D)	1.510 - 1.520
Density (20°C)	1.18 - 1.22 g/mL

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