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pH Adjuster

PHOSPHORIC ACID

CAS 7664-38-2
65

Safety score · 0–100

Fine

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

A strong inorganic acid used in trace amounts to fine-tune product pH. Safe in finished cosmetics where it is fully neutralised, but corrosive if handled neat.

Function

BUFFERING

Skin benefits

  • Effective pH adjuster
  • Used in trace amounts
  • Food-grade material
  • Stable inorganic acid

Known concerns

  • Strongly corrosive in concentrated form
  • Can irritate skin and eyes if not buffered
  • Must be neutralised in formula

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.