Sodium Algin Sulfate

Sodium Algin Sulfate 1
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Sodium Algin Sulfate 2
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Sodium Algin Sulfate 3
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AKA: Sulfated Alginate, Marine Polymer
Synthetic
Humectant
Not Clean
OriginDerived from sodium alginate, a polysaccharide naturally extracted from brown seaweed, then chemically modified with sulfate groups. Produced through sulfation of algin, where sulfuric acid or sulfur trioxide introduces sulfate esters onto the polymer backbone.
Sodium Algin Sulfate is the sulfate ester of Algin (q.v.)
CAS #
9010-06-4
Form
Powder
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Locks In Moisture
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed1 review →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
EWG
4
CIR
Safe as used
Pregnancy
Yes
Concentration Guide
CIR lists it as not reported to be in use.
CIR · report published 2015
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Verified Jun 2026
Data: CosIng · EWG · CIR