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No, dry ice must never be kept in a home refrigerator freezer. This is because the warmer temperature of the freezer will cause the dry ice to transform into a gas (sublimate) and the initial extremely cold temperature of the dry ice can cause the freezer thermostat to shut down (and potentially break). Moreover, if the dry ice is inside an airtight container, when it turns into a gas because the warmer temperature melts it, then it may cause the container to explode inside the freezer.
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