Magnesium Alginate

Magnesium Alginate 1
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Magnesium Alginate 2
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AKA: Alginic acid, Magnesium salt
Plant-Derived Synthetic
Emulsifier
Marine
Not Clean
OriginDerived from brown seaweed (kelp) through extraction of alginic acid, then chemically converted to its salt form. Produced by neutralizing alginic acid with magnesium compounds through chemical reaction and precipitation.
Alginic acid, magnesium salt
CAS #
37251-44-8
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
Functions
Binding
Emulsion Stabilising
Forces oil and water to stay mixed instead of separating into layers. The unsung hero holding your lotion together.
Viscosity Controlling
Anti-Inflammatory
Fights Acne
Antioxidant
Holds ingredients together
Keeps product blended
Controls product thickness
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
3
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