Ascophyllum Nodosum (Rockweed) Extract
Ascophyllum Nodosum (Rockweed) Extract
ASC
8/10
Concern level
High concern
Marine brown-algae extract from Ascophyllum nodosum, commonly used in cosmetics for conditioning, soothing, hydrating, and antioxidant-support claims; supplier literature and ingredient guides describe it as a water-soluble seaweed extract rich in fucoidan-like polysaccharides. ([ci.guide](https://ci.guide/marine-extracts/ascophyllum-nodosum-extract?utm_source=openai))
Pore-clogging
Non-comedogenic
Pregnancy
Safe
Regulatory
No data
Benefits
MoisturizingSoothingSupports Barrier Function
Chemical Properties
pH Range
4.00 - 8.00Typical Concentration
0.10% - 10.00%CAS Number: 84775-78-0
Skin Type Compatibility
dry skin8/10
oily skin5/10
sensitive skin6/10
acne prone5/10
mature skin7/10
normal skin7/10
Interactions
incompatible with: Avoid strong oxidizing systems and very acidic formulas when possible, because supplier guidance notes degradation/incompatibility with acids or oxidants for some Ascophyllum-based extracts. ([ci.guide](https://ci.guide/marine-extracts/ascophyllum-nodosum-extract?utm_source=openai))
Risks & Warnings
Usually low irritation risk, but marine extracts may be unsuitable for users with specific seaweed/iodine or botanical sensitivities; composition varies widely by extraction method, so impurity control matters. ([ci.guide](https://ci.guide/marine-extracts/ascophyllum-nodosum-extract?utm_source=openai))
Vegan Cruelty-Free
