According to the annual Trouble in Toyland Safety Survey, the group says it found "dangerously high" levels of the chemical boron in some popular slime toys.
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The boron was likely in the form of borax, which can be deadly if swallowed.
A member of the American Chemical Society refutes the findings, saying not all forms of Boron are toxic, and saying that most slimes are considered very low in toxicity.
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