The Lab
Specimen No. 0008
CautionMineralsunscreencolorant

Titanium Dioxide

CAS 13463-67-7 · TiO₂ · titanium dioxide · ci 77891 · tio2

Mineral UV filter that sits on top of skin without penetration. Reef-safe and non-hormonal — a safe alternative to chemical sunscreens in topical use.

high confidence
Researched April 18, 2026

Concerns

  • Nanoparticle form under review for inhalation risk in spray/powder formulations
  • EU banned as food additive (E171) in 2022 due to genotoxicity concerns

Sourcing & processing

mineral based

Regulatory flags

  • IARC Group 2B — nanoparticle inhalation risk
  • EU banned as food additive E171 (2022) — genotoxicity concern
  • Non-nano topical use considered safe; spray/powder forms pose inhalation risk

Commonly found in

Mineral sunscreenFoundationPowder cosmeticsFood coatings (restricted)

Research disclaimer: This rating is based on available peer-reviewed research and regulatory assessments at the time of publication. It is not medical advice. Consult a qualified professional for personal health or skin concerns.

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