Cooking food in microwavable plastic containers: in situ formation of a new chemical substance and increased migration of polypropylene polymers

•Microwavable food plastic containers can be the source of exogenous substances.•Cooking food within plastic materials increases migration of IAS and NIAS.•Compounds from these materials or leftovers from synthesis can react with foodstuff.•For the first time, in situ formation of NIAS has been dete...

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