- Registry number
- CHEM-002
- Preferred designation
- Sodium carbonate
- Common names
- Soda ash · washing soda (varies by hydrate)
- Chemical formula
- Na₂CO₃
- CAS registry
- 497-19-8
- PubChem CID
- 10340
- Formula mass
- 105.988 g/mol
- Class
- Alkali carbonate
Description & appearance
White solid; aqueous solutions are alkaline.
Occurrence & historical provenance
Occurs in some evaporite settings and is associated with natural trona and soda mineral resources. Industrial soda ash is a major bulk chemical.
Established uses
Glass manufacturing, detergents, water treatment, and pH adjustment in industrial processes.
Hazards & handling context
Can irritate eyes and skin. Do not confuse anhydrous soda ash with hydrated household washing-soda products: their masses and compositions differ.
Important distinctions
Sodium carbonate is not sodium bicarbonate. Their formulas, alkalinity, and industrial roles differ.
Source ledger
The following reference records were consulted for chemical identity and general descriptive claims. Industrial grades, formulations, and mixtures may have different hazard profiles.
Catalogued 2026-11-11 · PyreArms 0.2.0. This is an authored reference entry, not a certificate of laboratory analysis.