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TETRABROMOPHENOL BLUE

CAS 4430-25-5
25

Safety score · 0–100

Caution

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

About

A brominated phenol-based acid dye used in cosmetics at a restricted concentration (0.2% max since 2021), with no significant penetration due to its high molecular weight.

Tetrabromophenol Blue (C.I. 23850, acid blue 59) is listed in EU CosIng Annexes with a 0.2% maximum concentration restriction (same as the related compound above). The compound is a high-molecular-weight brominated dye with negligible skin penetration. Its phenol moiety and bromination pattern create environmental concerns, which is why it is subject to progressive restriction rather than outright approval. At the permitted concentration, direct consumer risk is low, but environmental classification is concerning.

Known concerns

  • EU CosIng restricted (0.2% max)
  • Environmental persistence
  • Phase-out candidate

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.