Calcium Alginate
AKA “Alginic acid calcium salt”
Ingredient
Ingredient Facts
Calcium alginate
AKA: Alginic acid calcium salt
Ingredient · Viscosity Controlling · EWG: 1
Synthetic
Marine
Clean
Alginic acid, calcium salt
CAS #
9005-35-0
Form
Powder
See origin →
Functions
Viscosity Controlling
Anti-Inflammatory
Wound Healing
Antimicrobial
Provides scent
Controls product thickness
Traditional Use
Derived from brown seaweed (kelp), alginates have been used for centuries in Asian cuisines and traditional medicine. Modern extraction and use in cosmetics as a thickening, film-forming, and moisturizing agent began in the 20th century.
Skin Types
●all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Concentration Guide
Dermal absorption: 2%. Source: CIR Safety Assessment (CIR Seq 680).
Regulatory Agencies
Polyurethane Versus Calcium Alginate Dressings for Split-Thickness Skin Graft Donor Site: A Systematic Review and Meta-Analysis.
Alsaif A, Karam M, Aldubaikhi AA, Alghufaily A, Alhuwaishel K et al.
Cureus, 2021
Calcium Alginate
European Commission
EU Cosmetic Ingredient Database (CosIng)
Calcium Alginate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Suitability of pea starch and calcium alginate as antimicrobial coatings on chicken skin.
Mehyar GF, Han JH, Holley RA, Blank G, Hydamaka A
Poultry science, 2007
Verified Jun 2026
Data: CosIng · EWG · CIR