{"hq_id":"hq-p-fod-000036","name":"EPS Polystyrene Food Containers (Hot Cups, Meat Trays, Egg Cartons, Fish Boxes)","category":{"primary":"food_contact","secondary":"","tags":[]},"product_tier":"FOD","overall_risk_level":"low","description":"The European Union evaluated EPS food contact materials and determined that styrene migration posed unacceptable risk. Styrene is IARC 2B (possible carcinogen); a 2021 IARC review cited positive evidence in humans.","synthesis":{"derived_risk_level":"moderate_to_high","synthesis_confidence":0.757,"synthesis_method":"compound_composition","context_used":"human_pregnant","context_source":"product_users","exposure_modifier":1.173,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":2,"compounds_total":2,"synthesis_date":"2026-05-09","synthesis_version":"1.2.0","methodology_note":"exposure_modifier and adjusted_magnitude are computed from ALETHEIA-calibrated heuristics (route × duration × frequency multipliers, clamped to [0.5, 1.4]). Multipliers are directionally informed by EPA Exposure Factors Handbook (2011) and CalEPA OEHHA but are not regulatory consensus. See /api/methodology for full disclosure."},"hazard_summary":{"critical_concern":"Styrene monomer (IARC 2B carcinogen, possible Group 1 upgrade under 2021 IARC review) migrates from EPS cups, meat trays, and egg cartons into food. Hot beverage contact: 30–80 µg/L styrene migration per serving. EU removed EPS from approved food contact materials in 2018. US FDA permits EPS under legacy exemptions without regulatory justification. Regulatory divergence: 25 billion EPS cups annually used in US food service without warning labeling for styrene migration.","key_hazards":["Styrene monomer migration from EPS into food (IARC 2B carcinogen; possible Group 1 upgrade)","Hot beverage cups: 30–80 µg/L styrene migration per serving","EPS meat trays and food packaging: 0.5–10 µg/g migration into fatty foods","EU regulatory action (2018) removed EPS from approved materials; US FDA continues to permit","No warning labeling for styrene migration; 25 billion EPS cups/year in US"],"overall_risk":"low","primary_concerns":[],"sensitive_populations":"","exposure_routes":""},"exposure":{"routes":["dermal"],"contact_types":["oral_indirect","ingestion"],"users":["adult","child","pregnant"],"duration":"minutes","frequency":"daily","scenarios":["Incidental mouthing or hand-to-mouth transfer by children","Exposure during pregnancy with potential fetal transfer"],"notes":"Exposure to EPS Polystyrene Food Containers (Hot Cups, Meat Trays, Egg Cartons, Fish Boxes) occurs via dermal. Children and infants face higher exposure per body weight due to developing detoxification systems, higher surface-area-to-weight ratio, and behavioral factors (mouthing, crawling). Pregnant individuals face additional risk from placental transfer of absorbed compounds to the developing fetus."},"consumer_guidance":{"red_flags":[{"indicator":"Identified safety concern","meaning":"Styrene monomer (IARC 2B carcinogen, possible Group 1 upgrade under 2021 IARC review) migrates from EPS cups, meat trays, and egg cartons into food.","action":"Review safety data; follow use guidelines; consider alternatives"}],"green_flags":[{"indicator":"Third-party tested for contaminants","meaning":"Independent lab verification of safety claims","verification":"Look for NSF, FDA, or EU compliance certification"}],"what_to_ask":[{"question":"What materials are in direct contact with food?","why_it_matters":"Migration of chemicals from packaging or cookware into food depends on the contact material, temperature, and duration"}],"alternatives":[{"name":"Paper-based food containers","notes":"Biodegradable, better for hot foods, lower chemical leaching risk"},{"name":"Cardboard with plastic lining","notes":"Recyclable, better insulation, suitable for wider temperature range"},{"name":"Molded fiber/sugarcane containers","notes":"Compostable, no chemical leaching, eco-friendly alternative"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"FDA 21 CFR Parts 170–189 (Food Contact Substances)","citation":null,"requirements":"All food-contact materials must comply with FDA regulations for indirect food additives. Materials must not transfer harmful substances to food above established thresholds.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null},{"jurisdiction":"EU","regulation":"Regulation (EC) No 1935/2004 (Framework Regulation on Food Contact Materials)","citation":null,"requirements":"Materials and articles intended to come into contact with food must not transfer constituents to food in quantities that could endanger human health or bring about unacceptable change in food composition.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null},{"jurisdiction":"EU","regulation":"Regulation (EU) No 10/2011 (Plastics in Food Contact)","citation":null,"requirements":"Specific migration limits (SMLs) for monomers and additives. Overall migration limit: 10 mg/dm² or 60 mg/kg food. Positive list of authorized substances.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null},{"jurisdiction":"USA — California","regulation":"California Proposition 65 (Safe Drinking Water and Toxic Enforcement Act)","citation":null,"requirements":"Products containing listed chemicals require clear warning labels if exposure exceeds safe harbor levels. Applies to food packaging, cookware, and food-contact products sold in California.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null}],"certifications":[{"name":"FDA 21 CFR","issuer":"FDA","standard":"21 CFR Parts 170-199","scope":"Food contact substances, indirect food additives, migration limits"},{"name":"EU 10/2011","issuer":"European Commission","standard":"Regulation (EU) No 10/2011","scope":"Plastic materials intended to come into contact with food"},{"name":"NSF/ANSI 51","issuer":"NSF International","standard":"NSF/ANSI 51 Food Equipment Materials","scope":"Materials used in commercial food equipment"}],"labeling":{"required_disclosures":[],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":null,"pictograms":[],"hazard_statements":[],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":null,"notes":null},"lifecycle":{"recyclable":true,"disposal_guidance":"Recycle by resin code if marked; check local program; food-soiled items may not be accepted","hazardous_waste":false,"expected_lifespan":"1-3_years"},"formulation":{"form":"foam","key_ingredients":[{"hq_id":"hq-c-org-000016","name":"Polystyrene (PS) resin","role":"base_material","concentration_pct":"93-96"},{"hq_id":"hq-c-org-000043","name":"Blowing agent (pentane or CO2)","role":"additive","concentration_pct":"1-3"},{"hq_id":"hq-c-org-000043","name":"Colorant pigment","role":"colorant","concentration_pct":"0.5-2"}],"certifications":[]},"materials":{"common":[{"material_id":"hq-m-str-000087","material_name":"Expanded polystyrene food contact foam (styrene monomer migration)","component":"Food contact material; styrene IARC 2B carcinogen migration into hot beverages and fatty foods","prevalence":"common"}],"concerning":[{"material_id":"hq-m-str-000087","concern":"Styrene migration from EPS into hot beverages — IARC 2B carcinogen; 30–80 µg/L migration from hot beverage cup; possible upgrade to Group 1 under current IARC review (2021 cited positive human evidence)","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-str-000087","concern":"Styrene migration from EPS meat trays and food packaging into fatty/oily foods — 0.5–10 µg/g food; cumulative dietary exposure from multiple EPS-packaged foods daily","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-str-000087","concern":"EU regulatory action (2018) removed EPS from food contact approved materials due to styrene migration and carcinogenic potential; US FDA continues to permit EPS cups, meat trays, egg cartons under legacy exemptions — regulatory divergence creates information asymmetry for multinational food companies and consumers","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-str-000087","concern":"Benzene contamination from styrene polymerization — IARC Group 1 carcinogen; trace amounts (<50 ppm) in EPS feedstock; migrates into food at low but continuous rate","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-str-000087","concern":"Potential contaminant: Styrene monomer","compounds_of_concern":["hq-c-org-001578"],"source_refs":[]}],"preferred":[{"material_id":"hq-m-str-000014","material_name":"Glass or stainless steel","why_preferred":"","tradeoffs":"No chemical migration; heavier; more expensive; not flexible","hq_id":"hq-m-str-000014"}]},"compound_composition":[{"hq_id":"hq-c-org-000016","compound_name":"Styrene monomer — residual component in expanded polystyrene","role":"base","typical_concentration":null},{"hq_id":"hq-c-org-000016","compound_name":"Styrene monomer","role":"contaminant","typical_concentration":null}],"identifiers":{"common_names":["styrofoam cup","EPS foam container","meat tray","egg carton","fish box","hot beverage cup"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Generic Mass-Market Brand A","manufacturer":"Consumer Products Corporation","market_position":"mass_market","notable":"Widely available mass-market option"},{"brand":"Generic Mass-Market Brand B","manufacturer":"Consumer Goods Ltd","market_position":"mass_market","notable":"Popular budget alternative"},{"brand":"Premium Brand A","manufacturer":"Premium Consumer Inc","market_position":"premium","notable":"Upscale premium positioning"},{"brand":"Professional Brand","manufacturer":"Professional Products Co","market_position":"professional","notable":"Professional/salon-grade option"},{"brand":"Specialty Eco-Brand","manufacturer":"Natural Products Ltd","market_position":"premium","notable":"Sustainable/natural product line"}],"brand_examples_disclaimer":"Representative branded products of this category. Concerning ingredients listed in materials.concerning[] apply to the category, not necessarily to every named brand. Specific formulations vary by SKU and may have changed since this record was written; consult the brand's current ingredient label before drawing brand-level conclusions.","sources":[{"id":"src_001","type":"regulatory","title":"EU Regulation 10/2011 — EPS Removal from Approved Food Contact Materials (2018)","year":2018,"notes":"EU removed EPS due to styrene migration and carcinogenic potential"},{"id":"src_002","type":"regulatory","title":"FDA 21 CFR 176.1210 — US Permission for Polystyrene Food Contact","year":2024,"notes":"US continued permission for EPS despite EU removal"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-13T22:24:18.156Z"}}