PENTAERYTHRITOL TETRA(3-MERCAPTOPROPIONATE) 7575-23-7

Product Name: Pentaerythritol Tetra(3-mercaptopropionate)
English Alias: PETMP; Pentaerythritol tetrakis(3-mercaptopropionate)
CAS Number: 7575-23-7
Molecular Formula: C₁₇H₂₈O₈S₄
Molecular Weight: 488.67 g/mol
Appearance: Colorless to pale yellow clear liquid
Package: 25 kg/drum, 200 kg/drum (HDPE plastic drum)

What is Pentaerythritol Tetra(3-mercaptopropionate)？

Pentaerythritol Tetra(3-mercaptopropionate) is a tetrafunctional mercaptan compound appearing as a colorless to pale yellow transparent liquid with a characteristic sulfurous odor. It is insoluble in water but soluble in most organic solvents. The compound serves as an effective chain transfer agent, crosslinking agent, and polymer modifier in various chemical processes. It exhibits high reactivity due to its four mercapto groups.

COA (Certificate of Analysis):

Test Item	Specification	Result
Appearance	Colorless to pale yellow liquid	Complies
Purity (GC)	≥ 95.0%	96.8%
Refractive Index (20°C)	1.510-1.520	1.515
Specific Gravity (25°C)	1.270-1.290	1.280
Mercaptan Content	≥ 20.5%	21.2%
Acid Value	≤ 5.0 mg KOH/g	2.8 mg KOH/g

Application:

Polymer Industry: Chain transfer agent in acrylic and styrene polymerizations

Adhesives: Crosslinking agent in epoxy and polyurethane systems

Optical Materials: Monomer for high refractive index polymers

Coatings: Modifier for radiation-curable coatings

Electronics: Component in optical lens and LED encapsulants

Chemical Synthesis: Multi-functional thiol reagent

Safety Profile:

Pentaerythritol Tetra(3-mercaptopropionate) has a strong unpleasant odor and may cause skin and eye irritation. Use appropriate personal protective equipment including chemical-resistant gloves, safety glasses, and adequate ventilation when handling. Avoid contact with skin and eyes. The substance is toxic to aquatic life. For comprehensive safety information, always consult the full Safety Data Sheet (SDS).

Storage Requirements:

Store in a cool, dry, well-ventilated area away from direct sunlight. Keep containers tightly closed and sealed under inert atmosphere. Maintain storage temperature between 15-25°C. Keep away from heat sources and oxidizing agents.

Transport & Packaging:

Pentaerythritol Tetra(3-mercaptopropionate) is packaged in HDPE plastic drums (25 kg or 200 kg net weight per drum). Transport according to applicable regulations for chemicals with unpleasant odor. Ensure containers are properly sealed and protected from physical damage during transportation. Store away from incompatible materials.