Ethylhexyl Triazone (Uvinul T 150)

Where it’s restricted

Named in the law or guidance

Also not allowed under mineral-only rules

Ethylhexyl Triazone (Uvinul T 150) isn’t named in these laws, but they allow only mineral (zinc oxide or titanium dioxide) sunscreens, so a product containing it is excluded anyway.

• Maui County (Maui, Molokaʻi, Lānaʻi) (in force since October 1, 2022)
• Hawaiʻi County (Big Island) (in force since December 1, 2022)

What the reef research says

Stien et al. (2020) exposed the hexacoral Pocillopora damicornis to ethylhexyl triazone, starting at 1000 µg/L and testing lower doses only when an effect appeared. Metabolomic profiling found no effect on coral metabolism at any tested dose. Apel et al. (2018) quantified it in surface sediments of the North and Baltic Seas at up to 2.0 ng/g dry weight and estimated a negligible hazard to sediment-dwelling organisms. In freshwater tests, Lavorgna et al. (2024) recorded a lethal median concentration in rotifers in the tens of mg/L and sub-chronic effects in ostracods at an EC50 of 210 µg/L. Chlorination produced byproducts that were more toxic: DBP1 had an EC50 of 9 µg/L in ostracods.

• Stien et al. 2020, Scientific Reports: A unique approach to monitor stress in coral exposed to emerging pollutants
• Apel, Joerss & Ebinghaus 2018, Chemosphere 212:254-261: Environmental occurrence and hazard of organic UV stabilizers and UV filters in the sediment of European North and Baltic Seas
• Lavorgna et al. 2024, Sci Total Environ: Ethylhexyl triazone sunscreen and its disinfection byproducts obtained after chlorine treatment: Ecofriendliness or ecotoxicity? (doi 10.1016/j.scitotenv.2024.177279)

Related ingredients: Bemotrizinol (Tinosorb S), Octocrylene, Avobenzone

Last reviewed October 14, 2026.