Pentaerythritol tetra(3-mercaptopropionate) is an organic compound that features both pentaerythritol and mercaptopropionate ester groups. This compound is commonly employed as a stabilizer and cross-linking agent in various chemical and industrial applications. Its properties make it suitable for enhancing the mechanical strength, thermal stability, and weather resistance of polymers and coatings. Additionally, it serves as a raw material for the production of other specialty chemicals and materials.