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pH Adjuster

POTASSIUM BIPHTHALATE

CAS 877-24-7 Updated
70

Safety score · 0–100

Fine

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

About

Potassium hydrogen phthalate — a standard pH buffer salt. Despite the name it is not the plasticizer kind of phthalate. Mild irritation only at high levels; otherwise low concern.

Function

BUFFERING

Skin benefits

  • Reliable pH buffer at acidic range
  • Stabilizes formulations
  • Low systemic toxicity

Known concerns

  • Mild eye and skin irritant in concentrate
  • Phthalate name confusion — but not an ortho-phthalate plasticizer

References

EU

EU CosIng database

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

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