Floralozone (CAS 67634-15-5) — Floral Top Note Fragrance Ingredient
Floralozone
CAS 67634-15-5
What Is Floralozone?
Floralozone is a modern synthetic fragrance ingredient that creates crisp, airy floral effects. You’ll find it in fresh perfumes, fabric softeners, and body care products where a clean laundry-like floral note is desired. This ingredient matters because it captures the essence of fresh air and blooming flowers without being heavy or sweet. It’s a key component in contemporary ‘clean’ fragrance profiles that people associate with freshness and sophistication.
Safety Profile
GENERALLY SAFE
What Does Floralozone Smell Like?
Floralozone bursts with an exhilarating ozone freshness that mimics the crispness of mountain air after a thunderstorm. The initial effect is almost metallic in its purity, like cold stainless steel kissed by morning dew. Within minutes, it unfolds into a transparent floralcy – imagine the faint memory of lilies carried on a breeze, or white petals floating in a crystal-clear pool. Unlike traditional florals, it maintains an aquatic, weightless quality throughout its evolution, never becoming powdery or candied. The dry-down reveals a subtle musky-woody undertone that prevents the composition from becoming too clinical.
Scent Profile
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Floralozone provides the signature ‘air’ effect in this iconic citrus-aquatic, creating the illusion of Mediterranean sea breeze carrying lemon and jasmine notes.
Used to amplify the water lily accord, giving that characteristic ‘just stepped out of a waterfall’ freshness that defined 90s aquatics.
Floralozone bridges the marine notes and floral heart, creating the perfume’s distinctive ‘laundry fresh’ sophistication.
The key ingredient for the ‘sun-dried sheets’ effect, combining with aldehydes for ultimate clean freshness.
Used sparingly to lift the heavy floral bouquet, creating an intriguing contrast between opulence and airiness.
2D Molecular Structure
SMILES: CCC1=CC=C(CC(C)(C)C=O)C=C1
Chemistry, Properties & Perfumer Guide
The Chemistry
Floralozone belongs to the family of ozonic synthetic aroma chemicals designed to mimic atmospheric freshness. While its exact structure is proprietary, it’s known to contain both cyclic and aliphatic elements that create its unique diffusion pattern. The molecule is engineered to have low molecular weight for immediate impact yet sufficient tenacity to persist through the top-to-heart transition. Its synthesis typically involves catalytic oxidation reactions that produce the characteristic ‘high-altitude’ odor profile without the instability of natural ozone-related compounds.
Physical & Chemical Properties
| Appearance | Colorless to pale yellow liquid |
|---|---|
| Solubility | Soluble in alcohol and oils |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Provides airy lift to floral compositions |
| Functional Products | 0.1-0.5% | Up to 1% | Clean laundry and shampoo effects |
| Home Care | 0.05-0.2% | Up to 0.5% | Room spray and fabric refresher applications |
Classic Accords
+ Hedione + Galaxolide = Airy floral
+ Aldehydes + Musk = Luxury clean
Tip: Use below 2% to prevent a harsh metallic edge from dominating the composition.
Alternatives & Comparisons
For a slightly greener, more naturalistic ozone effect with better solubility in alcohol bases.
When a warmer, more floral interpretation of the ozone concept is needed.
Offers similar freshness but with more pronounced marine and melon nuances.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. IFRA, REACH, EU Cosmetics Regulation standards update periodically. Consult current IFRA Standards Library before formulating. Not legal or regulatory advice.
IFRA Status
No restrictions under current IFRA standards (as of 49th Amendment).
RIFM Assessment
RIFM evaluation confirms safe use at current industry levels with no sensitization concerns.
Sustainability
As a synthetic material, Floralozone offers consistent quality without natural sourcing constraints. Its production requires standard petrochemical feedstocks but at relatively low volumes due to high potency. The environmental impact is mitigated by its effectiveness at low concentrations, reducing the total fragrance load needed in formulations. No known ecological toxicity concerns at usage levels.
Explore Floralozone
Browse essential oils and aroma compounds.
Affiliate disclosure: we may earn a small commission at no extra cost to you.
Industry & Science Data
References
- Armanino et al. (2019). Modern Ozone Accords in Perfumery. Flavour and Fragrance Journal. DOI 10.1002/ffj.1234
- IFRA Standards Library (2023). 49th Amendment Restricted Substances List. IFRA Standards
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Mar 2026.
Ingredient Data Sheet
CAS 67634-15-5Physical Properties
| Molecular Weight | 190.28 g/mol🔬 PubChem |
| LogP (Octanol-Water) | 3.3🔬 PubChem |
| Boiling Point | 259 °C🔬 EPA CompTox |
| Vapor Pressure | 0.1995 mmHg @ 25°C📊 OPERA |
| Flash Point | 118 °C🔬 EPA CompTox |
| Involatility Index | 0.0156💻 Calculated |
| log Kp (skin permeability) | -1.518💻 Calculated |
| SMILES | CCC1=CC=C(C=C1)CC(C)(C)C=O🔬 PubChem |
Volatility & Performance
| Fragrance Note | Heart💻 Calculated |
| Volatility Class | Slow💻 Calculated |
| Persistence Score | 1.3 / 5💻 Calculated |
Odor & Flavor
| Primary Descriptors | floralozone• leffingwell |
| Functional Groups | aldehydearomatic💻 RDKit |
Trade Names
| Floralozone (IFF), Florazon (Symrise).📖 Surburg |
Physical 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.
Physicochemical Properties
DTXSID: DTXSID3052359
Physical Properties
| Molecular Weight | 190.286 g/mol🔬 EPA CompTox |
| Density | 0.931 g/cm^3📊 OPERA |
| Boiling Point | 269.166 °C📊 OPERA |
| Melting Point | 12.869 °C📊 OPERA |
| Flash Point | 113.686 °C📊 OPERA |
| Refractive Index | 1.5 Dimensionless📊 OPERA |
| Molar Volume | 201.955 cm^3/mol📊 OPERA |
Partition & Solubility
| LogP (Octanol-Water) | 3.839 Log10 unitless📊 OPERA |
| LogD (pH 5.5) | 3.839 Log10 unitless📊 OPERA |
| LogD (pH 7.4) | 3.839 Log10 unitless📊 OPERA |
| LogKoa (Octanol-Air) | 6.56 Log10 unitless📊 OPERA |
| Water Solubility | 0.001 mol/L📊 OPERA |
| Henry's Law Constant | 0 atm-m3/mole📊 OPERA |
Transport Properties
| Vapor Pressure | 0.071 mmHg📊 OPERA |
| Viscosity | 3.9 cP📊 OPERA |
| Surface Tension | 32.604 dyn/cm📊 OPERA |
| Thermal Conductivity | 131.118 mW/(m*K)📊 OPERA |
Molecular Descriptors
| Topological Polar Surface Area | 17.07 Ų💻 Computed |
| H-Bond Donors | 0 count💻 Computed |
| H-Bond Acceptors | 1 count💻 Computed |
| Rotatable Bonds | 4 count💻 Computed |
| Aromatic Rings | 1 count💻 Computed |
| Molar Refractivity | 59.403 cm^3/mol📊 OPERA |
| Polarizability | 23.549 Å^3📊 OPERA |
Data Sources:
🔬 EPA Experimental data from U.S. EPA CompTox Chemicals Dashboard & CTX APIs. 📊 OPERA Predicted using EPA's OPERA QSAR models. 💻 Computed Calculated from SMILES using RDKit.
