Propylene Glycol Alginate
AKA: Alginate Propylene Glycol Derivative
Synthetic
Marine
Clean
Alginic acid, ester with 1,2-propanediol
CAS #
9005-37-2
Form
Powder
Functions
Binding
Viscosity Controlling
Boosts Collagen
Wound Healing
Anti-Inflammatory
Holds ingredients together
Controls product thickness
Traditional Use
Created in the mid-20th century by chemically modifying sodium alginate (a natural extract from brown seaweed). Used in cosmetics from the 1960s as a thickener and stabilizer, combining the gelling properties of seaweed-derived alginates with synthetic propylene glycol.
EWG
1
CIR
Safe as used
Pregnancy
Yes
Restricted By
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Concentration Guide
Dermal absorption: 2%. Source: CIR Safety Assessment (CIR Seq 680).
Regulatory Agencies
Skin Types
●all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
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.
Verified Jun 2026
Data: CosIng · EWG · CIR