Description TBEC is a colorless , liquid and high purity aliphatic peroxyester Chemical structure CAS No. / 34443-12-4 MW / 246.3 Specifications Typical Property Unit Standard Appearance Colorless liquid Assay % ≧95 Active oxygen % ≧6.17 Density ( 20 °C) g/cm3 0.930 Application It is effective as initiator for polymerization of styrene , ethylene , acrylics . It is also used in unsaturated polyester as curing agent.It is used in request of aromatic free. Packaging and storage 25Kg PE jerrycan. Stored below 30 ℃ under cold and shadow environment. In some strict application, it is recommended to store under 10 °C.