DCP(DICUMYL PEROXIDE) CAS No. 80-43-3 DCP99% Empirical Formula C6H5C(CH3)00(CH3)2C C6H5 Molecular Weight 270.37 Appearance White Crystalline Powder Specific Gravity 1.012 25/250 °C Peroxide Assay 99.0% min Melting Point 38 °C Active Oxygen 5.8% Half-life vs Temperature 116 °C /10hr 171 °C /1min Solubility Soluble in organic solvents. Synthetic & natural rubber, polyester resins.. etc. insoluble in water.