Iris germanica oil (butter) (CAS 85085-39-8) — Floral Heart to base Note Fragrance Ingredient
Iris germanica oil (butter)
CAS 85085-39-8
What Is Iris germanica oil (butter)?
Iris germanica oil, often called ‘iris butter’, is a precious natural ingredient derived from the roots of the iris flower. It’s found in luxury perfumes and high-end skincare products. This rare extract is prized for its velvety, powdery floral scent with earthy undertones that develops beautifully on skin.
Safety Profile
GENERALLY SAFEWhat Does Iris germanica oil (butter) Smell Like?
Iris butter unfolds with an initial waxy, vegetal greenness that quickly gives way to its signature scent: a luxurious bouquet of powdery violet-like florals with creamy orris undertones. The heart reveals a complex interplay of earthy rhizome and delicate floralcy, while the dry-down leaves a lasting impression of smooth, slightly sweet woody powder with a faintly rooty character that lingers elegantly for hours. Its texture is dense and buttery, releasing scent slowly like fine perfume unfolding on warm skin.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Showcases iris butter’s powdery elegance as the star note, balanced with fresh citrus and woody accords to create a diaphanous, luminous floral.
Uses iris butter’s cool sophistication as the foundation for a modern interpretation of classic cologne structure.
Amplifies iris butter’s earthy, rooty aspects to create a hauntingly beautiful metallic floral with incredible depth.
Innovatively pairs iris butter’s powderiness with cocoa and leather for a groundbreaking masculine floral.
Features iris butter’s refined elegance in a minimalist composition that highlights its natural texture and subtle sweetness.
Chemistry, Properties & Perfumer Guide
The Chemistry
Iris germanica oil (butter) is obtained through steam distillation or solvent extraction of the dried rhizomes, requiring 3-5 years of aging to develop its characteristic scent. The key aromatic components include irone isomers (α-, β-, and γ-irone), which are irones (C14H22O) that form through oxidative degradation of triterpenoid compounds during the aging process. These irones are responsible for the distinctive powdery-woody odor. The extract also contains myristic acid (tetradecanoic acid), which contributes to its waxy, butter-like physical properties. The complex maturation process creates numerous trace constituents that add depth to the fragrance profile.
Physical & Chemical Properties
| Appearance | Pale yellow to brown waxy solid |
|---|---|
| Solubility | Soluble in alcohol, insoluble in water |
| Melting Point | Approx. 38-42°C |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Used sparingly due to cost and intensity |
| Luxury Skincare | 0.1-0.5% | Up to 1% | Adds sensory elegance |
| Soap/Candle | 0.01-0.1% | Up to 0.5% | Very expensive for these applications |
| Cosmetic Powders | 0.05-0.3% | Up to 1% | Synergistic with talc notes |
Classic Accords
Tip: Warm slightly to liquefy before blending, and pair with ionones to enhance the powdery floral character.
Alternatives & Comparisons
From Iris pallida, often considered superior with more refined floral notes, but even rarer and more expensive.
Synthetic reconstruction offering consistent quality at lower cost, though lacks natural complexity.
Synthetic alternative providing similar powdery violet aspects without the rooty depth.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
No IFRA restrictions. Natural iris materials are exempt from standard restrictions due to traditional use and low sensitization potential.
RIFM Assessment
RIFM considers natural iris extracts safe as used in fragrance applications based on historical use and current data.
Sustainability
Iris cultivation requires significant land and years of growth before harvest, making sustainable sourcing crucial. Some producers are implementing responsible farming practices and fair trade initiatives. Synthetic alternatives reduce pressure on natural resources but lack the complexity of natural extracts. The lengthy production process and high value make iris butter vulnerable to adulteration in the supply chain.
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References
- Arctander, S. (1960). Perfume and Flavor Materials of Natural Origin.
- Joulain, D. (2006). The Atlas of Odor Character Profiles.
- Burdock, G.A. (2010). Fenaroli’s Handbook of Flavor Ingredients.
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
Report a data errorIngredient Data Sheet
CAS 85085-39-8Physical data: PubChem (NIH/NLM), U.S. EPA CompTox Dashboard, EPA OPERA models, RDKit. Odor & flavor: Arctander (Perfume & Flavor Chemicals), Fenaroli's Handbook of Flavor Ingredients, Leffingwell. Thresholds: van Gemert (Compilations of Odour Threshold Values). Regulatory: IFRA Standards 51st, FEMA GRAS. Trade names: Surburg (Common Fragrance & Flavor Materials). All data compiled and cross-referenced for perfumertools.com.
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