Chemical Structure:

| Chemical Name | Methyl ethyl ketone peroxide in dimethyl phthalate (MEKP) |
| CAS. No. | 1338-23-4 |
| Formula | C2H5C(OOH)(CH3)OOC(OOH)(CH3)C2H5 |
| Molecular Weight | 210.22 |
| Appearance | Liquid |
| Color | clear |
| Total Active Oxygen | 9.8-10.0% |
| Water | 2% max |
| Density, 20℃ | 1130 kg/m3 |
Packing: