A compound used in sunscreen turns toxic when it reacts with chlorine and ultraviolet rays, researchers have discovered

Swimming can turn your sunscreen toxic! Compound used in the protective lotions becomes deadly when it reacts with chlorine and the sun, increasing risk of cancer

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http://www.dailymail.co.uk/health/article-4649842/Don-t-swim-wearing-sunscreen.html#ixzz4ld2JqYt1

 https://www.thesun.co.uk/living/3906262/swimming-in-a-chlorinated-pool-can-turn-sun-cream-toxic-increasing-risk-of-cancer-scientists-warn/

http://www.usms.org/articles/articledisplay.php?aid=3221

http://www.dailymail.co.uk/health/article-4649842/Don-t-swim-wearing-sunscreen.html