Chemical filter

Bisoctrizole

Photostable hybrid UVA+UVB filter that also scatters light. Very low skin absorption. Australia allows 10%. Do not inhale the particles.

Bisoctrizole is a particulate organic filter with peaks around 305 nm and 360 nm. It both absorbs and scatters UV, which is why it is sometimes grouped with the mineral filters even though it is organic. It is highly photostable.

Australia and the EU allow 10% dermal use. SCCS found dermal use at 10% does not pose a systemic risk and genotoxicity testing was negative. The main caveat is inhalation of particles, so it should not go into sprays or loose powders.

It is not on the US OTC monograph. Toxicologically it sits with bemotrizinol as one of the more attractive modern filters.

Sources

Sunscreens with Bisoctrizole

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