In the U.S., the main chemical UVA filters are benzophenones, such as oxybenzone, and avobenzone.

WSJ: European Sunscreen Roadblock on U.S. Beaches

The Environmental Working Group says 56% of beach and sport sunscreens contain the chemical oxybenzone.

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The Food and Drug Administration has approved oxybenzone in sunscreen for use on children older than 6 months.

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The primary function of oxybenzone is to absorb ultraviolet light, but some research shows oxybenzone can be absorbed through the skin.

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The Environmental Working Group and other toxicology experts believe that oxybenzone is linked to hormone disruption and potentially to cell damage that may lead to skin cancer.

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The American Academy of Dermatology says oxybenzone is safe.

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"Oxybenzone is one of the few FDA-approved ingredients that provides effective broad spectrum protection from UV radiation, and has been approved for use since 1978, " said Dr. Daniel M.

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Experts say oxybenzone has a number of shortcomings.

WSJ: European Sunscreen Roadblock on U.S. Beaches