Potassium Alginate

AKA: Potassium salt of alginic acid, Kelp extract potassium salt

Synthetic

Emulsifier

Marine

Clean

OriginDerived from brown seaweed (Phaeophyceae) through extraction of naturally occurring alginic acid polymers. Produced by converting alginic acid to its potassium salt form through chemical neutralization.

Alginic acid, potassium salt

CAS #

9005-36-1

Form

Powder

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

Holds Formula Together

Stabilizes Emulsion

Controls Viscosity

Holds ingredients together

Keeps product blended

Controls product thickness

The paper trail

🔬Peer-reviewed1 paper →

⚖️Regulatory1 listing →

🛡️Safety-assessed2 reviews →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

EWG

CIR

Safe as used

Pregnancy

Yes

Concentration Guide

Leave-on1%

Rinse-offNot reported

0%50%100%

CIR reported use · 2013 survey

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR