Fucus vesiculosus absolute (CAS 68917-51-1) — Green Heart to base Note Fragrance Ingredient
Fucus vesiculosus absolute
CAS 68917-51-1
What Is Fucus vesiculosus absolute?
Fucus vesiculosus absolute is a rare extract from bladderwrack seaweed, primarily encountered in niche marine-inspired fragrances. It captures the briny, iodine-rich scent of ocean tides and coastal landscapes. This ingredient matters for its unique ability to evoke maritime environments with authenticity, offering perfumers a tool for creating evocative aquatic and oceanic accords that synthetic materials can’t fully replicate.
Safety Profile
USE WITH AWARENESSWhat Does Fucus vesiculosus absolute Smell Like?
Fucus vesiculosus absolute bursts with a pungent marine character – imagine storm-tossed seaweed drying on sun-warmed rocks. The opening is intensely briny with iodine sharpness, like low tide exposed to summer heat. As it evolves, a complex heart reveals damp cellulose decay, subtle fish oil nuances, and a haunting mineral dryness. The dry-down lingers with ambergris-like warmth, transforming oceanic rawness into a skin-hugging whisper of salted driftwood and sun-bleached shells.
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Uses fucus absolute as the structural backbone for its hyper-realistic seascape, amplifying salty marine tones with the material’s authentic seaweed bitterness.
Blends fucus with synthetic oud to create a novel ‘wet stone’ effect, where the seaweed’s iodine facets mimic mineralic dampness.
Pairs fucus absolute with boreal pine notes, using its marine decay aspects to suggest coastal forests battered by sea spray.
Features fucus in the heart to replicate cephalopod ink’s metallic salinity, enhanced by the absolute’s natural dimethyl sulfide content.
Uses aged fucus absolute to bridge synthetic ambergris materials with authentic ocean decay nuances for historical realism.
Chemistry, Properties & Perfumer Guide
The Chemistry
Fucus vesiculosus absolute contains complex sulfur compounds including dimethyl sulfide and methanethiol that create its characteristic marine odor. The material’s iodine content comes from natural accumulation of seawater minerals. Key odorants include bromophenols contributing to the fish oil aspect, alongside fucoxanthin pigments that may influence color. Extraction typically involves ethanol washing of dried seaweed followed by careful solvent evaporation to preserve volatile sulfur compounds. Unlike synthetic marine materials, this absolute contains trace amounts of algal sterols and polysaccharide degradation products that contribute to its textured dry-down.
Physical & Chemical Properties
| Appearance | Dark brown viscous liquid |
|---|---|
| Solubility | Partially soluble in ethanol (70%) |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.1-0.5% | Up to 1% | For marine realism in niche compositions |
| Functional Fragrance | 0.01-0.1% | Up to 0.3% | Spa products requiring oceanic authenticity |
| Home Fragrance | 0.05-0.2% | Up to 0.5% | Coastal-themed diffuser blends |
Classic Accords
Tip: Pre-dilute to 1% in ethanol before blending to manage the intense marine top notes.
Alternatives & Comparisons
Alternative seaweed absolute with less iodine sharpness, better suited for mainstream applications where realism can be softened.
Synthetic marine base combining seaweed, salt, and mineral aspects without the biological variability of natural fucus.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. Consult current IFRA Standards Library before formulating.
IFRA Status
Not currently restricted by IFRA, though recommended usage levels reflect its intense odor profile rather than safety concerns.
RIFM Assessment
RIFM has not conducted a formal safety assessment due to the material’s niche usage profile.
Sustainability
Fucus vesiculosus is sustainably wild-harvested in the North Atlantic during summer months when iodine content peaks. Ethical suppliers use hand-cutting methods that allow regrowth. Compared to synthetic marine materials, this absolute has lower carbon footprint but requires careful sourcing to avoid coastal ecosystem disruption. Some perfumers seek vintage batches as aging softens the iodine harshness while preserving marine character.
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References
- Marine Natural Products Chemistry (2012). Seaweed Volatiles. Springer. DOI 10.1007/978-3-642-31818-6_3
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Apr 2026.
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