How Supercritical CO2 Extraction Works

Above a certain pressure and temperature, carbon dioxide enters a supercritical state where it behaves as both a gas and a liquid at once — it flows through plant material like a gas but dissolves compounds like a solvent. Drop the pressure afterwards and it reverts to gas and leaves entirely, taking nothing with it and leaving nothing behind.

That combination is what makes the method valuable. It is gentle enough to preserve heat-sensitive molecules that steam distillation destroys, thorough enough to pull heavier compounds distillation cannot carry over, and clean enough to leave a genuinely solvent-free extract — which is the advantage absolutes cannot offer. Process background: CO₂ extraction.

Select and Total Extracts

Adjusting the pressure changes what the CO₂ dissolves, which gives two commercially distinct product types from the same plant.

State which type you need on the order. Buying a total extract for a fragrance application and finding a solid paste in the drum is an avoidable problem.

CO2 Extract vs Steam Distilled Oil

The same botanical gives genuinely different materials by the two routes, and the difference is not subtle. A CO₂ ginger extract carries the pungent compounds responsible for the heat of fresh ginger, which steam distillation largely leaves in the plant. CO₂ frankincense retains the heavier fraction distillation cannot bring across. Vanilla is only viable by CO₂ or solvent extraction, never by steam.

Where distillation still wins is price and familiarity: distilled oils are cheaper per kilo, available in far greater range, and most existing formulations are built around them. Treat CO₂ extracts as the upgrade for specific materials where the difference is worth paying for, not as a blanket replacement. Compare against our natural essential oils and floral absolutes.

Where CO2 Extracts Are Used

• Nutraceutical & supplement
  Where the active fraction matters more than the aroma, and a solvent-free process is a regulatory and marketing requirement rather than a preference.
• Clean-label flavour
  Spice and herb extracts for food and beverage where a hexane-extracted oleoresin would not satisfy the label. See also spice oils.
• Premium skincare
  Total extracts contribute actives, colour and a fuller botanical character to serums and balms at low inclusion levels.
• Certified natural products
  The obvious route where a natural or organic standard excludes solvent-extracted materials but you still need a true-to-plant profile.

CO2 Extract Sourcing Guide

Popular CO2 Extract Oils

Supercritical extracts across spice, resin, herb and floral material.

Explore the Full Catalogue

Eleven catalogues covering every extraction route we operate. If you are not sure which grade fits your application, describe the finished product and we will point you at the right one.

Technical & Buyer Information

How each extraction method works, how we test, and what ships with an order.