The use of CO2 for cannabis extraction is quickly positioning itself to be one of the leading technologies for industrial hash oil production. Although fairly new in cannabis concentrate processing, this technology is anything but new to the botanical extraction industry at large. Whether you prefer vape pens, salves or edibles, chances are that you have sampled a product that was produced using carbon dioxide (CO2) supercritical fluid extraction technology. Supercritical fluid extraction or SFE is the process of separating components from each other by use of a particular type of solvent. These types of solvents are labeled “supercritical” because when they are exposed to extreme temperatures and pressures, they display structures that fluctuate between intermediate states of solid, liquid, and gaseousness. Co2 is preferred by some patients because it has no residual solvents and is non-flammable.