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pH Adjuster

SODIUM CARBONATE

CAS 497-19-8
68

Safety score · 0–100

Fine

Derived from EU CosIng regulatory status, PubChem hazard data and published research. How we score.

Soda ash (Na2CO3) — a strongly alkaline mineral salt used to adjust pH. Useful in small amounts but irritating at higher concentrations.

Function

BUFFERINGBULKING

Skin benefits

  • pH adjuster/buffer
  • Softens hard water in cleansers
  • Mild abrasive in tooth powders
  • Food-grade mineral salt

Known concerns

  • Alkaline — can irritate skin, eyes, mucous membranes
  • Dries skin at higher use levels
  • Not for leave-on products without neutralization

References

EU

EU CosIng database

European Commission cosmetic ingredient registry: regulatory status, restrictions, authorised functions.

PC

PubChem

U.S. NIH compound data, GHS hazard codes and toxicity literature.

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Same plant / compound family

42
SODIUM CARBONATE PEROXIDE
Antimicrobial

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This profile is for educational purposes and does not constitute medical advice. Regulatory status and scientific understanding evolve, so always read the physical product label and consult a healthcare professional for personal concerns.