FlavScents AInsights Entry for Alpha-Farnesene (CAS: 502-61-4)
1. Identity & Chemical Information
Alpha-farnesene is a sesquiterpene hydrocarbon commonly found in the natural world. Its IUPAC name is (3E,6E)-3,7,11-trimethyl-1,3,6,10-dodecatetraene. The CAS number for alpha-farnesene is 502-61-4. While it does not have a FEMA number, it is recognized in various chemical databases. The molecular formula is C15H24, and it has a molecular weight of 204.35 g/mol. Alpha-farnesene is characterized by its conjugated diene structure, which contributes to its reactivity and odor profile.
Citation hooks: FlavScents; PubChem; FEMA
2. Sensory Profile
Alpha-farnesene is known for its green, woody, and apple-like aroma, often described as fresh and fruity. It is a key component in the aroma of green apples and contributes to the characteristic scent of many fruits. The compound is typically used as an impact note in formulations, providing a fresh and natural character. While specific odor thresholds are not well-documented, its intensity is moderate, making it suitable for both primary and background roles in fragrance and flavor compositions.
Citation hooks: FlavScents; peer-reviewed sensory literature
3. Natural Occurrence & Formation
Alpha-farnesene is naturally occurring in the peel of apples, as well as in other fruits such as pears and grapes. It is also found in various essential oils, including ginger and turmeric. The compound is biosynthesized in plants via the mevalonate pathway, a key metabolic route for the production of terpenoids. Its presence in fruits contributes to the "natural flavor" designation, enhancing the authenticity of fruit-based products.
Citation hooks: FlavScents; food chemistry literature; EFSA/JECFA monographs
4. Use in Flavors
In flavor applications, alpha-farnesene is used to impart a fresh, fruity note, particularly in apple and pear flavors. It is commonly employed in beverages, confectionery, and baked goods. Typical use levels in finished products range from 0.1 to 10 ppm, depending on the desired intensity and product type. The compound is relatively stable under typical processing conditions but may degrade under high heat or prolonged exposure to air.
Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature
5. Use in Fragrances
Alpha-farnesene is utilized in fragrance formulations for its fresh, green, and fruity aroma. It is often included in floral and fruity fragrance families, contributing as a top note due to its volatility. Typical concentrations in fragrance products range from trace amounts to 1%, depending on the formulation. Its role as a modifier or impact note enhances the naturalness and complexity of the scent profile.
Citation hooks: FlavScents; IFRA; fragrance chemistry texts
6. Regulatory Status (Regional Overview)
In the United States, alpha-farnesene is generally recognized as safe (GRAS) for use in flavors. In the European Union, it is regulated under Regulation (EC) No 1334/2008, with specific FL number status. Post-Brexit, the United Kingdom aligns closely with EU regulations. In Asia, regulatory frameworks vary, with Japan and China having specific guidelines for flavor and fragrance materials. In Latin America, countries like Brazil follow MERCOSUR regulations, which are generally harmonized with international standards.
Citation hooks: FEMA; EFSA; national authority publications
7. Toxicology, Safety & Exposure Considerations
Alpha-farnesene's safety profile is well-established for oral exposure, with no adverse effects reported at typical use levels in food. Dermal exposure in fragrance applications is considered safe, with low potential for irritation or sensitization. Inhalation exposure is minimal due to its low volatility. Overall, the compound poses a low risk in both food and fragrance applications, with a wide margin of safety.
Citation hooks: EFSA; FEMA; PubChem; toxicology literature
8. Practical Insights for Formulators
Alpha-farnesene is valued for its ability to impart a fresh, natural character to both flavors and fragrances. It synergizes well with other fruity and floral notes, enhancing the overall complexity of formulations. Formulators should be mindful of its volatility and potential for oxidation, which can affect stability. It is often under-utilized in formulations seeking a natural fruit profile.
Citation hooks: FlavScents; industry practice
9. Confidence & Data Quality Notes
The data on alpha-farnesene is well-documented, with robust sensory and safety profiles. While specific odor thresholds are not always available, industry practices provide reliable guidance for use levels. Regulatory information is comprehensive, though regional variations exist.
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
- If complex natural material: includes section 5a (not applicable here)
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 2026-09-01 14:00:08 GMT (p2)