Sodium Carbonate
AKA “497-19-8, Disodium carbonate, Soda Ash, Carbonic acid disodium salt, Sodium carbonate, anhydrous, Sodium carbonate anhydrous, Calcined soda, Solvay soda, Washing soda
Ingredient
Ingredient Facts
Sodium carbonate
AKA: 497-19-8, Disodium carbonate, Soda Ash, Carbonic acid disodium salt, Anhydrous, Sodium carbonate anhydrous, Calcined soda, Solvay soda, Washing soda
Ingredient · Buffering · EWG: 1
Synthetic
Clean
Sodium Carbonate is the disodium salt of carbonic acid with alkalinizing property. When dissolved in water, sodium carbonate forms carbonic acid and sodium hydroxide. As a strong base, sodium hydroxide neutralizes gastric acid thereby acting as an antacid.
Solubility Freely soluble in water. Insoluble in ethanol
Formula
CNa2O3
Mol. Weight
105.99
CAS #
497-19-8
Form
Powder
State
Other Solid; Liquid, Other Solid; Dry Powder; Water or Solvent Wet Solid; Liquid; Pellets or Large Crystals; Dry Powder, Liquid; NKRA
See origin →
Functions
Buffering
Bulking
Stabilizes pH
Adds Body & Volume
Wound Healing
Antioxidant Protection
Fights Bacteria
Maintains optimal pH
Adds volume
Traditional Use
An ancient mineral compound known as washing soda, used for centuries in laundry and cleaning. Historically derived from wood ash or mined from natural deposits; adopted into cosmetics for pH buffering and gentle cleansing applications.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Final Report on the Safety Assessment of Sodium Sesquicarbonate, Sodium Bicarbonate, and Sodium Carbonate
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Re-review Summary of Sodium Sesquicarbonate, Sodium Carbonate and Sodium Bicarbonate as Used in Cosmetics
Cosmetic Ingredient Review (CIR) Expert Panel
International Journal of Toxicology
Sodium Carbonate
European Commission
EU Cosmetic Ingredient Database (CosIng)
Sodium Carbonate
Environmental Working Group (EWG)
EWG Skin Deep Cosmetics Database
Re-Review Summary of Sodium Sesquicarbonate, Sodium Carbonate, and Sodium Bicarbonate as Used in Cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Cohen DE, Klaassen CD et al.
International journal of toxicology, 2025
Re-Review Summary of Sodium Sesquicarbonate, Sodium Carbonate, and Sodium Bicarbonate as Used in Cosmetics.
Fiume MM, Bergfeld WF, Belsito DV, Cohen DE, Klaassen CD et al.
International journal of toxicology, 2025
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR