Description

Trimethylolpropane Tris(3-Mercaptopropionate) is a trifunctional thiol crosslinking agent and chain transfer agent, widely recognized for its high reactivity and efficiency. This compound is essential for formulating advanced polymer systems that require precise control over molecular weight, crosslink density, and final material properties. It is a critical raw material for manufacturers in the polymer, coatings, adhesives, and electronics industries seeking to enhance product performance and processing characteristics.

Application

• Polymer Modification & Crosslinking: Acts as a key crosslinker in UV-curable resins, epoxy systems, and polyurethane networks, improving hardness, chemical resistance, and thermal stability.
• Chain Transfer Agent (CTA): Used in radical polymerization processes (e.g., for acrylics) to control molecular weight and polydispersity, enabling the synthesis of polymers with tailored properties.
• Optical Lens & Adhesive Production: A vital component in the formulation of high-refractive-index optical resins and optically clear adhesives (OCAs) for electronics and displays.
• Sealants & Encapsulants: Imparts excellent flexibility, adhesion, and durability to sealants and potting compounds used in construction and electronics.
• 3D Printing Resins: Serves as a reactive diluent and property modifier in stereolithography (SLA) and other photopolymer-based additive manufacturing resins.
• Surface Coatings: Enhances the cure speed, scratch resistance, and weatherability of industrial and protective coatings.

Basic Information

Product Name	Trimethylolpropane Tris(3-Mercaptopropionate)
CAS No.	33007-83-9
Molecular Formula	C15H26O6S3
Molecular Weight	398.55 g/mol
Synonyms	TMPMP; Trimethylolpropane Trimercaptopropionate; 2-Ethyl-2-(((3-mercaptopropanoyl)oxy)methyl)propane-1,3-diyl bis(3-mercaptopropanoate); TMPTMP; Tris(3-mercaptopropionyloxyethyl)propane; 1,1,1-Trimethylolpropane Tris(3-mercaptopropionate); Mercaptan crosslinker TMPMP; Thiol crosslinker 33007-83-9
EINECS	251-326-4

Quality Control

Our Trimethylolpropane Tris(3-Mercaptopropionate) is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including assay, impurity profile, and physical property verification, to ensure it meets the high standards required for industrial and advanced material applications. A Certificate of Analysis (COA) detailing all test results is provided with each shipment to guarantee traceability and consistency.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This product is easily oxidized; for long-term storage, maintaining an inert atmosphere (e.g., under nitrogen) is recommended to preserve its efficacy. Keep away from strong oxidizing agents, strong bases, and sources of heat.

Specification

Item	Specification
Appearance	Colorless to pale yellow clear liquid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0 %
Color (APHA)	≤ 100
Water Content (KF)	≤ 0.1 %
Acid Value	≤ 1.0 mg KOH/g
Refractive Index (n20D)	1.518 - 1.524
Density (20°C)	1.19 - 1.21 g/cm³

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