Study detects DNA-reactive, mutagenic substances in recycled PE, PP, and PS

119 plastic samples including polyethylene (PE), polypropylene (PP), polystyrene (PS), and polyethylene terephthalate (PET) tested for mutagenicity; no DNA-reactive, mutagenic substances in PET but in 51 of the other samples, making them unsafe, especially for food contact applications; recycling process identified as source; dataset of over 600 organic chemicals in recycled high-density PE pellets published

Oligomer migration from PET and Tritan™

Scientists find cyclic polyethylene terephthalate (PET) oligomers migrate into fatty food simulants but not olive oil; levels higher from recycled compared to virgin PET; comprehensive extraction and migration experiments of Tritan™ products find oligomer migration from bottles of no toxicological concern but microwaveable containers were non-suitable for food heating

Degradation of compostable plastics can increase toxicity, scientists emphasize

Studies analyze biodegradable – including compostable – plastics for their in vitro toxicity and chemical composition; comparison with conventional plastics indicates higher toxicity of compostables which further increases with photodegradation and composting; detect brominated flame retardants in “biodegradable”-labeled food packaging

Studies suggest food packaging as exposure source to organophosphate esters

Two groups of scientists analyze occurrence and migration of organophosphate esters (OPEs) from hundreds of Chinese plastic and paper food packaging; one study reports higher concentration of OPEs in plastics and migration of 15 out of 23 targeted OPEs; another study identifies presence of 42 and migration of 26 OPEs and identifies seven new compounds

Baby foods as dominant pathway for infant exposure to antioxidants

Targeted analysis demonstrates widespread contamination of Chinese baby foods with traditional and novel antioxidants; plastic food packaging identified as one source; prevalent and high migration of 2,4-di-tert-butylphenol from different types of plastics

Chemical characterization of post-consumer and recycled plastics

Scientists perform target and non-target screening of recycled plastics and provide recommendations on methods; detect >280 organic chemicals and metals in 21 plastic flakes and pellets used in recycling; analyze several recycled polymers and find polyethylene terephthalate (PET) the only one currently complying with European circular economy requirements; compare analytical methods to assess the chemical composition of recyclates giving their strenghts and limitations

Scientists find most silicon rubber kitchenwares are endocrine disrupting

Study determines toxicity and composition of 42 silicon rubber food contact articles; finds 84% of silicon kitchenware to induce endocrine activity; review gives update on the known endocrine disruptors phthalates and bisphenols with focus on detection methods and addressing regulatory concerns; study develops and applies method for phthalate determination in vegetable oils

Toward a guidance to assess safety of food packaging coatings

Interlaboratory study evaluates protocol for consistent safety assessment of coated metal packaging materials; guidance comprises sample preparation, chemical and biological analysis; finds technical differences affect outcome; emphasizes need for aligned protocol to avoid inconsistencies

Oligomers – presence in FCMs and food, toxicity, challenges

Review summarizes analysis and presence of oligomers in food contact materials (FCMs) made of polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polystyrene (PS) including challenges; study suggests ionic strength may influence migration of polyamide (PA) oligomers from PA FCMs

Studies assess composition and safety of chemicals in recycled HDPE

Scientists analyze volatile compounds in recycled high-density polyethylene (HDPE); detect 53 chemicals in two post-consumer HDPE milk bottles including plastic additives and non-intentionally added substances (NIAS); risk assessment shows samples do not comply with plastic food packaging regulation; report re-granulation process in mechanical recycling to remove most but not all odor and volatile organic compounds