FlavScents AInsights Entry for Eucalyptus Radiata Leaf/Stem Oil (CAS: 92201-64-4)

1. Identity & Chemical Information

Eucalyptus radiata leaf/stem oil, commonly known as narrow-leaved peppermint oil, is a natural complex material derived from the leaves and stems of the Eucalyptus radiata plant. It is not a single compound but a mixture of various constituents. The CAS number for this essential oil is 92201-64-4. While it does not have a specific FEMA number, it is recognized in various flavor and fragrance applications. Other identifiers include its FL number and CoE number, which are used in regulatory contexts. The composition of eucalyptus radiata oil can vary significantly depending on the geographical origin, harvest time, and processing methods.

Citation hooks: FlavScents; PubChem; FEMA

2. Sensory Profile

Eucalyptus radiata oil is characterized by its fresh, camphoraceous, and slightly sweet aroma, with a hint of citrus and mint. It is often described as having a medium to high intensity with a clean, uplifting diffusion. The oil is primarily used as an impact note in both flavor and fragrance formulations, providing a refreshing and invigorating quality. While specific taste and odor thresholds are not well-documented, its sensory role is typically as a top note in fragrance compositions and as a modifier in flavor systems.

Citation hooks: FlavScents; peer-reviewed sensory literature

3. Natural Occurrence & Formation

Eucalyptus radiata is native to Australia and is cultivated in various regions for its essential oil. The oil is extracted through steam distillation of the leaves and stems. As a natural product, it qualifies for "natural flavor" or "natural fragrance" designations under many regulatory frameworks. The formation of its key constituents involves complex biosynthetic pathways within the plant, including enzymatic processes that produce terpenes and other aromatic compounds.

Citation hooks: FlavScents; food chemistry literature; EFSA/JECFA monographs

4. Use in Flavors

Eucalyptus radiata oil is used in flavor applications for its refreshing and cooling properties. It is commonly found in confectionery, oral care products, and beverages. The oil acts as a functional modifier, enhancing the overall flavor profile with its distinctive minty and camphoraceous notes. Typical use levels in finished products range from 5 to 50 ppm, depending on the desired intensity and product type. The oil is relatively stable under normal processing conditions but can be sensitive to prolonged exposure to heat and light.

Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature

5. Use in Fragrances

In the fragrance industry, eucalyptus radiata oil is valued for its fresh, clean scent and is used in a variety of product types, including personal care products, household cleaners, and air fresheners. It contributes primarily as a top note, providing an initial burst of freshness. Typical concentration ranges in fragrance formulations are from 0.1% to 2%, depending on the product and desired effect. The oil's volatility makes it suitable for applications where a quick, uplifting aroma is desired.

Citation hooks: FlavScents; IFRA; fragrance chemistry texts

5a. Key Constituents (Typical)

Eucalyptus radiata oil typically contains a range of terpenes, with 1,8-cineole (eucalyptol) being the predominant constituent, often comprising 60-75% of the oil. Other significant components include alpha-terpineol, limonene, and alpha-pinene. The exact composition can vary based on factors such as the plant's growing conditions and the distillation process used.

Citation hooks: FlavScents; peer-reviewed literature; authoritative industry references

6. Regulatory Status (Regional Overview)

In the United States, eucalyptus radiata oil is generally recognized as safe (GRAS) for use in flavors by FEMA. In the European Union, it is regulated under Regulation (EC) No 1334/2008 and has an assigned FL number. The UK follows similar regulations post-Brexit. In Asia, countries like Japan and China have specific guidelines for essential oils, while ASEAN countries often harmonize their standards. In Latin America, regulations can vary, with Brazil and MERCOSUR countries having their own frameworks. Explicit approvals and harmonized assumptions are common, but country-specific variability exists.

Citation hooks: FEMA; EFSA; national authority publications

7. Toxicology, Safety & Exposure Considerations

Eucalyptus radiata oil is generally considered safe for use in both flavor and fragrance applications when used within recommended levels. For oral exposure, the acceptable daily intake (ADI) is not specifically established, but typical use levels are well below thresholds of concern. Dermal exposure in fragrances is subject to IFRA guidelines, which address potential irritation and sensitization risks. Inhalation exposure is generally safe, but occupational exposure limits should be observed in manufacturing settings. The risk profiles for food and fragrance applications are similar, with no significant differences noted.

Citation hooks: EFSA; FEMA; PubChem; toxicology literature

8. Practical Insights for Formulators

Eucalyptus radiata oil is valued for its versatility and refreshing aroma. It blends well with other essential oils, such as peppermint, rosemary, and citrus oils, enhancing their freshness and complexity. Formulators should be cautious of its strong camphoraceous note, which can dominate if overused. It is often under-utilized in complex blends where its subtle sweetness can add depth. Proper storage and handling are essential to maintain its quality and efficacy.

Citation hooks: FlavScents; industry practice

9. Confidence & Data Quality Notes

The data on eucalyptus radiata oil is well-established, with extensive documentation in both flavor and fragrance contexts. Industry practices are generally consistent, though some variability in composition and regulatory interpretations exists. Known data gaps include specific sensory thresholds and detailed toxicological profiles, which are areas for further research.

Citation hooks: FlavScents

QA Check

• All required sections 1-9 are present
• "Citation hooks:" line is present under each section
• Flavor section includes ppm ranges
• Toxicology section covers oral, dermal, inhalation
• Regulatory section mentions US, EU, UK, Asia, Latin America
• As a complex natural material, includes section 5a

About FlavScents AInsights (Disclosure)
FlavScents AInsights integrates information from authoritative government, scientific, academic, and industry sources to provide applied, exposure-aware insight into flavor and fragrance materials. Data are drawn from regulatory bodies, expert safety panels, peer-reviewed literature, public chemical databases, and long-standing professional practice within the flavor and fragrance community. Where explicit published values exist, they are reported directly; where gaps remain, AInsights reflects widely accepted industry-typical practice derived from convergent sensory behavior, historical commercial use, regulatory non-objection, and expert consensus. All such information is clearly labeled to distinguish documented data from professional guidance or informed estimation, with the goal of offering transparent, practical, and scientifically responsible context for researchers, formulators, and regulatory specialists. This section is generated using advanced computational language modeling to synthesize and structure information from established scientific and regulatory knowledge bases, with the intent of supporting—not replacing—expert review and judgment.

Generated 2026-07-01 13:00:31 GMT (p2)