FlavScents AInsights Entry: Seaweed Absolute (Fucus vesiculosus et serratus) (CAS: 68917-51-1)
1. Identity & Chemical Information
Seaweed absolute, derived from Fucus vesiculosus and Fucus serratus, is a complex natural material used in both flavor and fragrance industries. It is not a single chemical compound but a mixture of various constituents. The CAS number for seaweed absolute is 68917-51-1. While it does not have a specific FEMA number, it is recognized in various industry references for its unique properties. As a natural extract, it lacks a defined molecular formula or molecular weight. The composition of seaweed absolute can vary significantly depending on the source, harvest time, and processing methods.
Citation hooks: FlavScents; PubChem; FEMA
2. Sensory Profile
Seaweed absolute is characterized by its marine, green, and slightly earthy aroma, reminiscent of the ocean. It has a moderate intensity and a unique diffusion that can add depth and complexity to both flavors and fragrances. The sensory role of seaweed absolute often includes acting as a background realism note or a modifier, enhancing the authenticity of marine-themed compositions. Specific odor and taste thresholds are not well-documented, but its impact is generally subtle, requiring careful balancing in formulations.
Citation hooks: FlavScents; peer-reviewed sensory literature
3. Natural Occurrence & Formation
Seaweed absolute is naturally sourced from brown algae species, primarily Fucus vesiculosus and Fucus serratus, found in coastal regions. The formation of its characteristic aroma compounds involves enzymatic degradation and other natural processes occurring during the drying and extraction of the seaweed. Its designation as a "natural flavor" or "natural fragrance" is supported by its direct derivation from plant material without synthetic modification.
Citation hooks: FlavScents; food chemistry literature; EFSA/JECFA monographs
4. Use in Flavors
In flavor applications, seaweed absolute is used to impart marine and umami notes, often in seafood-flavored products or to enhance savory profiles. It serves as a functional modifier, providing depth and authenticity. Typical use levels in finished food products range from 1 to 10 ppm, with variations depending on the desired intensity and product type. Seaweed absolute is generally stable under typical food processing conditions, though it may be sensitive to high heat and prolonged exposure to air, which can lead to oxidation.
Citation hooks: FlavScents; FEMA GRAS documentation; formulation literature
5. Use in Fragrances
Seaweed absolute is utilized in fragrance compositions to evoke marine and oceanic themes. It is commonly found in aquatic and fougère fragrance families, contributing as a trace realism note or a background modifier. Typical concentration ranges in perfumes are from 0.1% to 1%, depending on the desired effect. Its volatility is moderate, making it suitable for middle to base note applications, where it provides a lasting marine character.
Citation hooks: FlavScents; IFRA; fragrance chemistry texts
5a. Key Constituents (Typical)
The key constituents of seaweed absolute include various volatile compounds such as aldehydes, ketones, and alcohols, which contribute to its characteristic aroma. Notable components may include fucol, fucophlorethol, and other phenolic compounds. The exact composition can vary based on the seaweed's origin, harvest conditions, and extraction methods, making it essential for formulators to verify specific profiles with suppliers.
Citation hooks: FlavScents; peer-reviewed literature; authoritative industry references
6. Regulatory Status (Regional Overview)
In the United States, seaweed absolute is generally recognized as safe (GRAS) for flavor use, though specific regulatory approvals may vary. In the European Union, it falls under the scope of Regulation (EC) No 1334/2008 for flavorings, with its use subject to general safety assessments. The United Kingdom follows similar guidelines post-Brexit. In Asia, including Japan and China, and in Latin America, such as Brazil, regulatory acceptance is typically aligned with international standards, though specific approvals should be verified regionally.
Citation hooks: FEMA; EFSA; national authority publications
7. Toxicology, Safety & Exposure Considerations
For oral exposure, seaweed absolute is considered safe within typical flavor use levels, with no specific ADI or MSDI established. Dermal exposure in fragrance applications should consider potential sensitization, although it is generally regarded as low-risk. Inhalation exposure is minimal due to its moderate volatility, but occupational safety measures should be observed during handling. 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
Seaweed absolute is valued for its ability to impart authentic marine notes, making it a versatile ingredient in both flavors and fragrances. It synergizes well with other marine and green notes, enhancing complexity. Formulators should be cautious of its potential to overpower delicate compositions and should consider its stability under various conditions. It is often under-used in non-marine contexts where its unique profile could add unexpected depth.
Citation hooks: FlavScents; industry practice
9. Confidence & Data Quality Notes
The data on seaweed absolute is well-established in terms of its sensory profile and typical applications. However, specific regulatory and safety data may be less documented, requiring formulators to rely on industry-typical practices and supplier information. Known data gaps include precise compositional analysis and comprehensive toxicological studies.
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
- Includes section 5a for complex natural material
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 2026-05-01 15:36:56 GMT (p2)