Can plastic and paper food packaging release unknown chemicals?
Use caution with hot, oily, or long-stored food in disposable packaging. A 2026 Journal of Hazardous Materials study identified 114 compounds migrating from paper, plastic, and multilayer food-contact materials during standardized tests.
What is actually in it
Food packaging can include plastic, paper, coatings, inks, adhesives, stabilizers, and recycled-material residues. Some chemicals are added on purpose. Others are impurities or breakdown products.
Hot food, oily food, acidic sauces, and long storage can increase contact between food and packaging.
What the research says
A 2026 Journal of Hazardous Materials study tested 16 commercial food-contact materials, including paper, plastic, and multilayer paper and plastic materials. The researchers used non-target screening and toxicity prediction.
The study identified 114 migration compounds. Plasticizers and non-intentionally added substances were common categories. Some compounds were unique to paper-based materials, while others were frequent in plastics.
This does not mean every package is dangerous. It does show that routine testing can miss chemicals beyond the usual short list.
What to do at home
Use disposable packaging for transport, not long-term storage. Move hot or oily leftovers into glass, stainless steel, or ceramic containers.
Do not microwave takeout containers unless the package clearly says it is made for that use. Dry foods are a lower concern than hot, oily meals.