{"hq_id":"hq-p-fod-000003","name":"Plastic food storage containers","category":{"primary":"food_contact","secondary":"kitchen storage","tags":["Tupperware","food containers","plastic containers","meal prep","Pyrex alternative","plastic storage","BPA","microwave containers"]},"product_tier":"FOD","overall_risk_level":"high","description":"Reusable plastic containers used to store, refrigerate, freeze, and often reheat food. The plastic type is the critical variable: polypropylene (PP, resin code #5) and high-density polyethylene (HDPE, #2) are generally the lowest-concern options; polycarbonate (#7, BPA-based) was the historic standard but is now largely phased out for food use. The hazard profile varies dramatically by resin type, temperature of use, and food type.","synthesis":{"derived_risk_level":"low","synthesis_confidence":0.58,"synthesis_method":"compound_composition","context_used":"human_infant","context_source":"product_users","exposure_modifier":1.15,"vulnerability_escalated":true,"escalation_reason":"Infant exposure group","compounds_resolved":20,"compounds_total":20,"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":{"sensitive_populations":"pregnant women, children","overall_risk":"high","primary_concerns":["Carcinogenicity concern (high): Di-2-ethylhexyl phthalate, Vinyl Chloride, Propylene BPA leaches from PC containers into food contents. Phthalate plasticizers (DEHP) migrate into fatty and hot foods."],"exposure_routes":"indirect oral (food/drink contact)"},"exposure":{"routes":["dermal"],"contact_types":["oral_indirect"],"users":["adult","child","infant","pregnant"],"duration":"momentary","frequency":"daily","scenarios":["Incidental mouthing or hand-to-mouth transfer by children","Exposure during pregnancy with potential fetal transfer"],"notes":"Exposure is dietary — compounds migrate from container into food and are ingested. The highest-risk scenarios are: (1) microwaving fatty food in plastic containers; (2) storing acidic or fatty food for extended periods; (3) using old, scratched, or dishwasher-damaged PC containers. Infants and children have higher relative exposure per body weight."},"consumer_guidance":{"red_flags":[{"indicator":"Resin code #7 on the bottom without 'BPA-free' marking","meaning":"Resin code #7 ('other') historically included polycarbonate. Legacy #7 containers without explicit BPA-free labeling are likely polycarbonate.","action":"Replace with PP (#5) or glass. Do not microwave or dishwash any #7 container without BPA-free confirmation."},{"indicator":"Cloudiness, crazing, or scratching inside the container","meaning":"Physical degradation of the polymer surface, indicating increased leaching potential and surface area for migration.","action":"Replace the container. Plastic food containers have a finite useful life."},{"indicator":"Microwaving fatty food in any non-PP, non-glass container","meaning":"Heat + fat dramatically increases migration of plasticizers, BPA, and other additives from polymer to food.","action":"Transfer food to a glass or PP container labeled 'microwave safe' before heating."},{"indicator":"'BPA-free' containers made from resin code #7","meaning":"Some 'BPA-free' #7 containers substitute BPS or BPF. These alternatives may have comparable estrogenic activity.","action":"Verify the replacement chemistry if endocrine disruption is the specific concern."}],"green_flags":[{"indicator":"Resin code #5 (PP) or #2 (HDPE) on the bottom","meaning":"Lower-concern plastics for food contact; no BPA; minimal plasticizers in typical food-grade formulations.","verification":"Recycling triangle with number 5 or 2 on container base."},{"indicator":"Glass container with silicone or PP lid","meaning":"Inert food-contact surface; no migration from container body.","verification":"Visual confirmation. Verify lid material — stainless, silicone, or PP are preferred over PC or PVC lids."}],"what_to_ask":[{"question":"What resin is this container made from?","why_it_matters":"Resin type determines hazard profile. PP and HDPE are the lowest concern; PC (legacy) is highest.","good_answer":"Resin code #5 (PP) or #2 (HDPE) clearly marked on the container.","bad_answer":"No resin code, or resin code #7 without BPA-free confirmation."},{"question":"Is this container safe for microwave and dishwasher?","why_it_matters":"Thermal stress (microwave) and alkaline detergents (dishwasher) both increase migration from plastic containers, particularly for BPA from PC.","good_answer":"Microwave-safe and dishwasher-safe labeling for PP containers. Glass containers are safe for both.","bad_answer":"No guidance, or microwave-safe labeling on a #7 (PC) container."}],"alternatives":[{"name":"Glass storage containers","notes":"Non-toxic, microwave-safe, does not leach chemicals into food"},{"name":"Stainless steel containers","notes":"Durable, non-reactive, maintains food integrity and temperature"},{"name":"Ceramic containers with glass lids","notes":"Food-safe, inert material, suitable for heating and long-term storage"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"FDA 21 CFR Part 177 — Indirect food additives: polymers","citation":null,"requirements":"Establishes specific migration limits and permitted uses for food-contact polymers. Polycarbonate is still permitted for adult food contact; FDA banned BPA in baby bottles/sippy cups (2012) and infant formula packaging (2013) after industry abandonment.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":"src_004"},{"jurisdiction":"EU","regulation":"EU Regulation No 10/2011 on plastic materials and articles in contact with food","citation":null,"requirements":"Specific migration limits for regulated substances. BPA permitted in adult food contact at SML 0.05 mg/kg food until 2025 ban takes effect.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":"src_005"}],"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":"solid","key_ingredients":[{"hq_id":"hq-c-ino-000083","name":"Polypropylene (PP) or HDPE resin","role":"base_material","concentration_pct":"92-96"},{"hq_id":"hq-c-ino-000109","name":"Antioxidant stabilizer","role":"stabilizer","concentration_pct":"0.1-0.5"},{"hq_id":"hq-c-org-000043","name":"Colorant pigment","role":"colorant","concentration_pct":"0.5-2"},{"hq_id":"hq-c-org-001396","name":"Slip agent","role":"additive","concentration_pct":"0.1"}],"certifications":[]},"materials":{"common":[{"material_id":"hq-m-str-000005","material_name":"Polypropylene (PP) — resin code #5","component":"container body","prevalence":"very_common","notes":"The current industry-standard for food-grade reusable containers (Rubbermaid, Ziploc, most modern Tupperware). PP has no phthalate plasticizers and no BPA. Low leaching risk at normal food-contact temperatures. Safe for microwave per FDA guidelines (though heat-induced migration of antioxidant additives is an emerging research area)."},{"material_id":"hq-m-str-000003","material_name":"High-Density Polyethylene (HDPE) — resin code #2","component":"container body","prevalence":"common","notes":"Used in some food containers, deli containers, butter tubs, and large-format storage. Lower heat tolerance than PP — not recommended for microwave. Minimal additive load; generally considered one of the safer plastics for food contact."},{"material_id":"hq-m-str-000007","material_name":"Polycarbonate — resin code #7","component":"container body (legacy products)","prevalence":"rare","notes":"PC was the dominant material for hard, clear, reusable food containers until the BPA controversy of the late 2000s. Most major brands have phased out PC for food contact. Legacy PC containers (pre-2010) are still in circulation. BPA leaches from PC, accelerated by heat and alkaline detergents (dishwashers)."},{"material_id":"hq-m-str-000002","material_name":"PET — resin code #1","component":"container body (single-use deli/takeout containers)","prevalence":"common","notes":"PET is used in deli, takeout, and single-use food containers. Not designed for reuse or high-heat use. Antimony trioxide (catalyst residue) and acetaldehyde are the primary migration concerns under heat."},{"material_id":"hq-m-str-000001","material_name":"PVC — resin code #3","component":"container body (older/specialty products)","prevalence":"rare","notes":"PVC food containers are largely discontinued in North America and EU for food contact due to phthalate plasticizer concerns. Legacy PVC containers may still be in use."}],"concerning":[{"material_id":"hq-m-str-000007","material_name":"Polycarbonate (BPA-based) — resin code #7","concern":"BPA leaches from PC containers into food contents. Accelerated by heat, alkaline cleaning agents, and UV exposure over time. Dishwasher washing of PC containers significantly increases BPA migration in subsequent uses.","compounds_of_concern":["hq-c-org-000006","hq-c-org-000019"],"source_refs":["src_001","src_002"]},{"material_id":"hq-m-str-000001","material_name":"PVC containers (legacy)","concern":"Phthalate plasticizers (DEHP) migrate into fatty and hot foods. Legacy PVC containers should not be used for food storage.","compounds_of_concern":["hq-c-org-000007","hq-c-org-000008"],"source_refs":["src_003"]}],"preferred":[{"material_id":null,"material_name":"Glass containers (borosilicate or soda-lime)","why_preferred":"No polymer; no migration; inert at all food-contact temperatures including microwave and oven. Lids may be PP, silicone, or stainless — check lid material.","tradeoffs":"Heavy; breakable; more expensive upfront. Oven-safe glass (borosilicate) costs more than soda-lime."},{"material_id":"hq-m-str-000005","material_name":"Polypropylene (PP) — resin code #5","why_preferred":"No BPA; no phthalates; lowest documented leaching risk among common food-contact plastics at normal storage and microwave temperatures.","tradeoffs":"Not fully inert — antioxidant additives (Irganox, Irgafos) can migrate into food, especially fatty foods at heat. Lower heat tolerance than glass."},{"material_id":"hq-m-str-000023","material_name":"Silicone (food-grade, platinum-cured)","why_preferred":"Flexible, heat-stable, no BPA, no phthalates. FDA-cleared for food contact. Used for lids, bags, and some containers.","tradeoffs":"Tin-cured silicone (lower cost) has higher migration risk than platinum-cured. Look for 'platinum-cured' or 'FDA food-grade' labeling. Planned: hq-m-str-000023."}]},"compound_composition":[{"hq_id":"hq-c-org-000006","compound_name":"Bisphenol A","role":"compound_of_concern","typical_concentration":null},{"hq_id":"hq-c-org-000019","compound_name":"Bisphenol S (BPS)","role":"compound_of_concern","typical_concentration":null},{"hq_id":"hq-c-org-000007","compound_name":"Di-2-ethylhexyl phthalate","role":"compound_of_concern","typical_concentration":null},{"hq_id":"hq-c-org-000008","compound_name":"Vinyl Chloride","role":"compound_of_concern","typical_concentration":null},{"hq_id":"hq-c-org-000508","compound_name":"Propylene","role":"base","typical_concentration":null},{"hq_id":"hq-c-org-000507","compound_name":"Ethylene","role":"base","typical_concentration":null},{"hq_id":"hq-c-org-000019","compound_name":"Bisphenol S (BPS) — in 'BPA-free' PC alternatives","role":"contaminant","typical_concentration":null},{"hq_id":"hq-c-org-000217","compound_name":"Nonylphenol (NP) and nonylphenol ethoxylates (NPEs)","role":"contaminant","typical_concentration":null},{"hq_id":"hq-c-ino-000042","compound_name":"Antimony trioxide (FR synergist)","role":"additive","typical_concentration":null},{"hq_id":"hq-c-org-000028","compound_name":"Acetaldehyde","role":"contaminant","typical_concentration":null},{"hq_id":"hq-c-ino-000001","compound_name":"Lead-based heat stabilizers","role":"additive","typical_concentration":null},{"hq_id":"hq-c-ino-000005","compound_name":"Cadmium-based heat stabilizers","role":"additive","typical_concentration":null},{"hq_id":"hq-c-mix-000058","compound_name":"Nanoplastics (<1μm)","role":"degradation_product","typical_concentration":null},{"hq_id":"hq-c-mix-000064","compound_name":"Polypropylene microplastics","role":"degradation_product","typical_concentration":null},{"hq_id":"hq-c-ino-000215","compound_name":"Nanoclay (montmorillonite nanoparticles)","role":"additive","typical_concentration":null},{"hq_id":"hq-c-org-002005","compound_name":"R-143a (1,1,1-Trifluoroethane / HFC-143a)","role":"Refrigerant in cooling systems for food storage","typical_concentration":null},{"hq_id":"hq-c-org-002009","compound_name":"R-744 (Carbon dioxide / CO2 refrigerant)","role":"CO2 transcritical refrigeration in commercial food storage","typical_concentration":null},{"hq_id":"hq-c-ino-000013","compound_name":"R-717 (Ammonia / NH3 refrigerant)","role":"Ammonia refrigeration in commercial food cold chain","typical_concentration":null},{"hq_id":"hq-c-org-002013","compound_name":"R-404A (HFC-404A refrigerant blend)","role":"Dominant refrigerant in supermarket food display cases","typical_concentration":null},{"hq_id":"hq-c-org-002015","compound_name":"R-600a (Isobutane / HC-600a refrigerant)","role":"Standard refrigerant in domestic refrigerators/freezers","typical_concentration":null}],"identifiers":{"common_names":["plastic food storage containers","plastic food storage container"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Rubbermaid","manufacturer":"Newell Brands","market_position":"mass_market","notable":"Mass-market plastic food storage containers"},{"brand":"Tupperware","manufacturer":"Tupperware Brands","market_position":"mass_market","notable":"Plastic food storage and prep containers"},{"brand":"Pyrex","manufacturer":"Corning","market_position":"mass_market","notable":"Glass food storage containers; heat-safe"},{"brand":"Oxo","manufacturer":"Oxo","market_position":"premium","notable":"Premium ergonomic kitchen storage solutions"},{"brand":"Stasher Bags","manufacturer":"Stasher","market_position":"premium","notable":"Reusable silicone food storage bags"}],"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":"journal","title":"Leaching of bisphenol A from polycarbonate baby bottles: effects of dishwashing and repeated use","url":"https://doi.org/10.1016/j.envint.2007.09.001","accessed":"2026-03-08","year":2008,"notes":"Milwaukee Health Department; BPA leaching from PC bottles increased significantly after dishwasher exposure"},{"id":"src_002","type":"journal","title":"Bisphenol A release from polycarbonate bottles under real-use and stress conditions","url":"https://doi.org/10.1289/ehp.0901225","accessed":"2026-03-08","year":2009,"notes":"Documents BPA migration from PC bottles under temperature stress and repeated washing"},{"id":"src_003","type":"echa","title":"DEHP restriction in food contact materials — REACH Annex XIV","url":"https://echa.europa.eu/authorisation-list","accessed":"2026-03-08","year":2011,"notes":"ECHA authorization/restriction framework for DEHP in food contact applications"},{"id":"src_004","type":"fda","title":"FDA: Questions and Answers on Bisphenol A (BPA) Use in Food Contact Applications","url":"https://www.fda.gov/food/food-additives-petitions/questions-and-answers-bisphenol-bpa-use-food-contact-applications","accessed":"2026-03-08","year":2018,"notes":"FDA's current position and historical actions on BPA in food contact materials"},{"id":"src_005","type":"efsa","title":"EU Regulation 10/2011 on plastic materials in food contact","url":"https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32011R0010","accessed":"2026-03-08","year":2011,"notes":"EU framework regulation for plastic food contact materials including migration limits"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-13T22:19:33.854Z"}}