Black pepper oleoresin is extracted by CO2 under Total Extract condition, that mean they are typically extracted at high pressures and temperature.
Total CO2 extracts typically contain both volatile and non-volatile CO2 soluble components of the plant. Depending on the plant part used, aromatics, heavier waxes, fatty acids, resins and coloring compounds may be present in the extract. Total CO2 extracts typically consist of molecules ranging from C5 to C60, more viscous, can dissolve in lipophilic liquids such as essential oils and vegetable oils.
Black pepper Oleoresin CO2 Extract contains the main ingredients are piperine, volatiles, and resin.