FlavScents AInsights Entry for (E,E)-2,4-decadienal (CAS: 25152-84-5)

1. Identity & Chemical Information

• Common Name(s): (E,E)-2,4-decadienal
• IUPAC Name: (2E,4E)-deca-2,4-dienal
• CAS Number: 25152-84-5
• FEMA Number: 2362
• Other Identifiers: FL No. 05.073
• Molecular Formula: C10H16O
• Molecular Weight: 152.24 g/mol

(E,E)-2,4-decadienal is an unsaturated aldehyde characterized by its conjugated double bonds, which contribute to its potent odor profile. The presence of these functional groups is crucial for its sensory attributes, providing a strong, fatty, and citrus-like aroma that is highly valued in both flavor and fragrance applications.

Citation hooks: FlavScents; PubChem; FEMA

2. Sensory Profile

(E,E)-2,4-decadienal is renowned for its intense, fatty, and citrus-like odor, often described as reminiscent of deep-fried or cooked chicken. It possesses a high odor intensity and is used as an impact note in flavor formulations. The compound's odor threshold is relatively low, making it effective even at minimal concentrations. Its sensory role is primarily as an impact note, providing authenticity and depth to savory flavors.

Citation hooks: FlavScents; peer-reviewed sensory literature

3. Natural Occurrence & Formation

(E,E)-2,4-decadienal naturally occurs in various foodstuffs, including cooked meats, fish, and certain oils. It is primarily formed through the thermal oxidation of linoleic acid, a common fatty acid found in many plant oils. This compound is significant in the context of "natural flavor" designations, as it can be derived from natural sources through controlled thermal processes.

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

4. Use in Flavors

(E,E)-2,4-decadienal is extensively used in savory flavor formulations, particularly in meat, poultry, and fried food profiles. It serves as a key impact note, enhancing the authenticity and richness of these flavors. Typical use levels in finished food products range from 0.1 to 5 ppm, with higher concentrations potentially leading to overpowering effects. The compound is relatively stable under heat but can be prone to oxidation, necessitating careful formulation to maintain its sensory qualities.

Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature

5. Use in Fragrances

In fragrance applications, (E,E)-2,4-decadienal is utilized for its ability to impart a fresh, fatty note that enhances the realism of certain accords, particularly in gourmand and savory-themed fragrances. It is typically used in trace amounts due to its high potency, contributing primarily to the top and middle notes of a fragrance composition. Its volatility is moderate, allowing it to provide a lasting impact without overwhelming other components.

Citation hooks: FlavScents; IFRA; fragrance chemistry texts

6. Regulatory Status (Regional Overview)

• United States: Recognized as GRAS by FEMA for flavor use.
• European Union: Approved under Regulation (EC) No 1334/2008 with FL No. 05.073.
• United Kingdom: Follows EU regulations post-Brexit with no significant divergence reported.
• Asia: Approved for use in Japan and China, with specific concentration limits varying by country.
• Latin America: Generally accepted in Brazil and MERCOSUR countries, subject to local regulations.

Explicit approvals exist for flavor use, with harmonized assumptions across regions. However, country-specific variability may occur, particularly in Asia and Latin America.

Citation hooks: FEMA; EFSA; national authority publications

7. Toxicology, Safety & Exposure Considerations

For oral exposure, (E,E)-2,4-decadienal is considered safe within the typical use levels in food, with an established ADI by relevant authorities. Dermal exposure in fragrance applications is generally low risk, but IFRA guidelines should be consulted to avoid potential sensitization. Inhalation exposure is minimal due to its moderate volatility, though occupational safety measures 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

(E,E)-2,4-decadienal is valued for its ability to impart a realistic, savory note to flavor and fragrance formulations. It synergizes well with other aldehydes and fatty acids, enhancing the overall sensory profile. Formulators should be cautious of its high potency, as overuse can lead to an undesirable, overpowering effect. It is often under-utilized in fragrance applications, where its unique profile can add depth and authenticity.

Citation hooks: FlavScents; industry practice

9. Confidence & Data Quality Notes

The data on (E,E)-2,4-decadienal is well-established, with comprehensive sensory and regulatory information available. Industry practices are well-documented, though some variability in natural occurrence data may exist due to differing formation pathways. Known data gaps are minimal, with most regulatory ambiguities resolved through harmonized international standards.

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 2026-08-21 05:14:22 GMT (p2)