In short
Butter CO2 extract is a carbon-dioxide extract of butter. It is an animal-derived natural with the smell of fresh butter, rich cream and milk.
What Butter CO2 Extract smells like
Eden Botanicals describes Butter CO2 as a maverick in natural perfumery, animal rather than botanical in origin, buttery with rich cream and milk notes, valued mainly as a fixative that complements jasmine, ylang-ylang and neroli and has an exalting effect on base notes. Fraterworks describes the scent as characteristic of fresh butter with a mildly butyric acidity in the top, useful for creamy notes in florals and woods, especially sandalwood.
- Leading note
- Fresh butter
- Clear facets
- Cream
- Supporting facets
- Milk
- Faint facets
- Butyric
- Character
- Rich, soft
What makes Butter CO2 Extract distinctive
Real dairy butter as a perfumery natural.
How Butter CO2 Extract is used
Used in traces to add creaminess and naturalness to white florals, woods (especially sandalwood) and gourmand accords, and as a fixative.
Typical role: fixative (slow to evaporate; helps a blend last and holds lighter notes); modifier (used in small amounts to change the character of a blend).
How Butter CO2 Extract differs from similar materials
- Butyl Butyryllactate
- Butyl butyryllactate is a synthetic buttermilk, sour and cultured; butter CO2 is real butter, creamy and milky.
Each difference compares the published descriptions of the two materials. Smell varies with grade, supplier and dilution; compare them side by side on blotters before substituting one for another.
Formulation considerations
Animal-derived (dairy), so not suitable for vegan products. A waxy solid at room temperature that liquefies with gentle warmth. No CAS number specific to the extract was confirmed.
Identity and classification
- Type
- CO2 extract
- Origin
- Natural
- Odour family
- Gourmand
- Note position
- Heart to base note
- Physical form at room temperature
- Semi-solid
- Also known as
- Butter CO2
No CAS number is shown: suppliers use different identifiers for this material, and none could be confirmed as its own.
Safety and compliance
This page is general information, not a safety assessment or a specification. Confirm identity, composition, IFRA status and allergen content from your supplier's documents for the lot you hold.
Materials it works with
-
Sulfurol
Aroma chemical · Gourmand — beefy, nutty
-
Sandalwood Oil (Santalum album)
Essential oil · Woody / Musky — woody, creamy, milky, sweet
-
Jasmine Absolute (Grandiflorum)
Absolute · Floral / Animalic — jasmine, floral, indolic, fruity
Used in formulas and accords
Used in 8 published formulas
Butter CO2 Extract is an ingredient in 5 perfume formulas, 2 accords and 1 base in the Formula & Accord Library.
Community formulas
RUŌOD House Originals
Original compositions by RUŌOD House.
Further reading
Questions about Butter CO2 Extract
Is Butter CO2 Extract natural or synthetic?
Butter CO2 Extract is natural. It is an extract obtained from plant material with carbon dioxide under pressure (supercritical or subcritical), with no solvent left behind.
Which published formulas use Butter CO2 Extract?
Butter CO2 Extract is used in 8 published formulas in the RUŌOD Lab Formula & Accord Library, including Banana Bread, Chocolate Accord and Cookies & Cream Accord. Each is listed with a link under "Used in formulas and accords" on this page.
Sources
- Eden Botanicals — Butter CO2 — distributor's description.
- Fraterworks — Butter Signature CO2 — distributor's description.
- Olfactory profile: the RUŌOD Lab team's synthesis of the published descriptions above, reviewed 26 October 2026. Evidence: more than one published description. Classification and the short description: revision 1. Descriptions of odour are judgement, not measurement.