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Preservative

TRIS(N-HYDROXYPROPYL) HEXAHYDROTRIAZINE

CAS 25254-50-6
30

Safety score · 0–100

Caution

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

A hexahydrotriazine biocide that releases formaldehyde. Used in metalworking fluids and some industrial preservatives. Sensitizing and not recommended in modern cosmetics — treat as caution-level.

Skin benefits

  • Effective broad-spectrum biocide in industrial fluids

Known concerns

  • Formaldehyde donor
  • Skin and respiratory sensitizer
  • Not recommended for leave-on cosmetics
  • H317 sensitization classification

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, so always read the physical product label and consult a healthcare professional for personal concerns.