murphyAlgin
Synthetic
Not Clean
OriginDerived from brown seaweed (Phaeophyceae), algin is a naturally occurring polysaccharide extracted as a raw material. Synthesized by chemically extracting and purifying sodium alginate from dried seaweed through alkaline treatment and precipitation.
Algin is a cosmetic ingredient. Rated moderate hazard by EWG.
CAS #
9005-38-3, 57606-04-9
Skin Types
●all-skin-types
Best For
General
Functions
Viscosity Controlling
Binding
Provides scent
Holds ingredients together
Controls product thickness
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory0 listings
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
3
CIR
Insufficient
Pregnancy
—
CIR Safety Findings
Not a Skin Irritant
3 studies / 3 not irritating (CIR 680)
Not an Eye Irritant
1 study / 1 not irritating (CIR 680)
Not a Sensitizer
1 study / 1 not sensitizing (CIR 680)
Concentration Guide
Leave-on0.001–18%
Rinse-off0.01–50%
0%50%100%
CIR reported use · 2013 survey
Regulatory Agencies
Verified Jun 2026
Data: CosIng · EWG · CIR