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pH Adjuster

NITROUS ACID

CAS 7782-77-6 Updated
8

Safety score · 0–100

Avoid

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

About

Highly corrosive inorganic acid. Acutely toxic, severe skin and eye burns, forms carcinogenic nitrosamines. Not appropriate for cosmetic formulations as a free ingredient.

Function

HUMECTANTSOLVENT

Skin benefits

  • No legitimate leave-on cosmetic use

Known concerns

  • GHS H300 fatal if swallowed
  • H314 causes severe skin burns and eye damage
  • H318 causes serious eye damage
  • H400 very toxic to aquatic life
  • Forms carcinogenic nitrosamines with secondary amines

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.