Seaweed Absolute (CAS ) — Seaweed IFRA Note Fragrance Ingredient
Seaweed Absolute
CAS
What Is Seaweed Absolute?
Seaweed absolute is a concentrated fragrance material extracted from marine algae, primarily used in oceanic and fresh aquatic perfumes. It captures the briny, mineral-rich scent of the sea with vegetal undertones. This ingredient matters because it provides authentic marine accords that synthetic materials struggle to replicate, adding realism to beach-inspired fragrances and evoking powerful coastal memories.
Safety Profile
USE WITH AWARENESSWhat Does Seaweed Absolute Smell Like?
Seaweed absolute bursts with an intense marine character – imagine wet rocks at low tide, ozonic sea spray, and the vegetal depth of sun-warmed kelp. The opening is sharply saline with iodine-like mineral tones that gradually soften into a green, almost cucumber-like freshness. As it dries, reveals earthy undertones resembling damp driftwood with a lingering ambergris-like musk. Unlike synthetic calone, this maintains an organic complexity that evolves on skin, never becoming overly sweet or metallic.
Scent Profile
In Famous Fragrances
Fragrance associations may not reflect actual formulations.
Used here to create hyper-realistic tidal pool effects, blending with ozonic notes and ambergris. The seaweed adds necessary organic depth to prevent the marine accord from becoming too sterile.
Forms the briny core of this beachside composition, paired with citrus and vetiver. The seaweed absolute provides the crucial iodine-like facet that makes the marine accord smell authentically oceanic.
Chemistry, Properties & Perfumer Guide
The Chemistry
Seaweed absolute is a complex mixture obtained through solvent extraction of brown algae (primarily Laminaria and Fucus species). It contains sulfur compounds like dimethyl sulfide contributing to the marine character, along with terpenes, phenolic compounds, and halogenated metabolites unique to marine plants. The exact composition varies by species and harvest location, with North Atlantic varieties showing higher iodine content.
Physical & Chemical Properties
| Appearance | Dark green to brown viscous liquid |
|---|---|
| Solubility | Soluble in alcohol, insoluble in water |
Perfumer Guide
| Application | Typical % | Range | Notes |
|---|---|---|---|
| Fine Fragrance | 0.5-2% | Up to 5% | Used sparingly for marine realism |
| Home Fragrance | 0.1-0.5% | Up to 1% | Adds oceanic depth to candles |
Classic Accords
Tip: Pre-dilute in alcohol before adding to blends to prevent precipitation of waxy components.
Alternatives & Comparisons
Synthetic marine note for when a cleaner, less vegetal effect is desired. Lacks the iodine complexity of real seaweed but provides better stability.
Safety, Regulatory & Sustainability
⚠ Regulatory Disclaimer
General reference only. IFRA, REACH, EU Cosmetics Regulation standards update periodically. Consult current IFRA Standards Library before formulating. Not legal or regulatory advice.
IFRA Status
No specific restrictions under current IFRA standards (Amendment 51).
RIFM Assessment
RIFM has evaluated similar seaweed extracts as safe for use in fragrance at reported levels.
Sustainability
Wild harvesting of seaweed requires careful management to prevent ecosystem damage. Some producers now use cultivated algae from sustainable aquaculture. Synthetic alternatives exist but lack the full spectrum of natural seaweed’s olfactory profile. Extraction yields are low, making this a relatively expensive material.
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References
- Marine Natural Products Chemistry (2016). Chemical Reviews. DOI: 10.1021/acs.chemrev.5b00480
Data: PubChem (NIH), PubMed, RIFM, IFRA. Last reviewed: Mar 2026.
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