Octinoxate (Octyl Methoxycinnamate)
The question

Is Octinoxate (Octyl Methoxycinnamate) safe in chemical sunscreen?

AvoidChemical sunscreen

Chemical UV-B filter that penetrates the skin and may disrupt thyroid and estrogen pathways. Banned in Hawaii and Palau due to coral reef toxicity.

What the research flags

  • Endocrine disruption — estrogenic and thyroid-disrupting activity in animal studies
  • Detected in blood, urine, and breast milk (FDA 2019)
  • Coral reef toxicity — Hawaii banned it in 2021
  • Photodegrades into potentially more toxic compounds

Regulatory
Hawaii banned in sunscreen (2021) — coral reef damage

Other chemical sunscreen ingredients on file

Sources & references

  1. [1]
    Peer-reviewedPubMed / NCBI — pubmed.ncbi.nlm.nih.gov · ref 32053327
  2. [2]
    DatabaseIngredient database — the-trouble-with-sunscreen-chemicals
  3. [3]
    Peer-reviewedPubMed / NCBI — pubmed.ncbi.nlm.nih.gov · ref 17524435

Research disclaimer: Ratings reflect peer-reviewed research and regulatory assessments available at the time of publication, not the dose or formulation of any specific chemical sunscreen product. This is not medical advice.