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pH Adjuster

TRISODIUM PHOSPHATE

CAS 7601-54-9
70

Safety score · 0–100

Fine

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

A strongly alkaline sodium phosphate salt used as a pH adjuster and chelator. Safe in trace cosmetic amounts but caustic in pure form — handled carefully during formulation.

Skin benefits

  • Strongly raises pH — useful as a pH adjuster
  • Acts as a chelator for hard-water metal ions
  • Cost-effective compared with other alkaline buffers

Known concerns

  • Highly alkaline and caustic in concentrated form
  • Skin and eye irritant at high concentrations
  • Banned in foods in some jurisdictions due to phosphate eutrophication concerns

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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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.