At what temperature does aluminum foil become toxic?

Online Answer
Even if the maximum temperature is 400 degrees, the answer is probably not. Just like steel, aluminum alloys become weaker as the service temperature rises. But aluminum melts at only about 1,260 degrees, so it loses about half of its strength by the time it reaches 600 degrees..
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30 minutes per pound at 350 degrees F until Internal Temperatures reaches 175 degrees F..