{"hq_id":"hq-p-fod-000072","name":"Reusable Silicone Food Storage Bags","category":{"primary":"food_contact","secondary":"storage","tags":["silicone bag","siloxane","D4","D5","food storage","reusable"]},"product_tier":"FOD","overall_risk_level":"low","description":"Reusable silicone bags (Stasher, Zip Top) marketed as sustainable alternatives to single-use plastic bags. Platinum-cured food-grade silicone is generally inert, but manufacturing residuals include cyclic siloxanes (D4, D5) which are endocrine disruptors. Heating in microwave or dishwasher may increase siloxane migration.","synthesis":{"derived_risk_level":"high","synthesis_confidence":0.5,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":0.977,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":1,"compounds_total":1,"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":"general population","overall_risk":"low","primary_concerns":["Cyclic siloxane (D4) residuals — EU reproductive toxicant classification","Increased migration during microwave heating"],"exposure_routes":"Oral ingestion via food contact"},"exposure":{"routes":["oral"],"contact_types":["oral_direct"],"users":["adult","child"],"duration":"minutes","frequency":"daily","scenarios":["Daily food storage and reheating in silicone bags","Microwave reheating — heat accelerates siloxane migration","Fatty food storage (fats absorb more siloxanes)"],"notes":"D4 (octamethylcyclotetrasiloxane) is classified as a reproductive toxicant in the EU. Migration levels from food-grade silicone are generally very low but increase with heat and fatty foods. Platinum-cured silicone has lower residuals than peroxide-cured."},"consumer_guidance":{"usage_warning":"Choose platinum-cured silicone (higher quality, lower residuals). Avoid microwaving fatty foods in silicone bags. Wash new silicone bags in hot soapy water before first use.","safer_alternatives":["Glass containers with silicone lids","Stainless steel food containers","Beeswax wraps for cold food storage"],"alternatives":[{"name":"Glass containers with silicone lids","notes":"Safer alternative to conventional products"},{"name":"Stainless steel food containers","notes":"Safer alternative to conventional products"},{"name":"Beeswax wraps for cold food storage","notes":"Safer alternative to conventional products"}],"red_flags":[{"indicator":"Scratched, stained, or discolored food-contact surface","meaning":"Surface damage increases chemical migration into food.","action":"Replace food-contact items showing visible wear."},{"indicator":"No FDA compliance or food-safe marking","meaning":"Materials may not meet food-contact safety standards.","action":"Choose products marked FDA-compliant or NSF certified."}],"green_flags":[{"indicator":"Third-party safety certification visible on packaging","meaning":"Product has been independently tested to applicable safety standards.","verification":"Look for certification logos (CPSIA, ASTM, EN, NSF, UL, OEKO-TEX)."}],"what_to_ask":[{"question":"What materials is this product made from?","why_it_matters":"Material composition determines chemical exposure potential.","good_answer":"Full material disclosure with known safe materials.","bad_answer":"No material information or unspecified."}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"FDA 21 CFR Parts 170-199","citation":"21 CFR 170-199","requirements":"Food-contact materials must comply with FDA indirect food additive regulations.","compliance_status":null,"effective_date":null,"enforcing_agency":"FDA","penalties":null,"source_ref":null},{"jurisdiction":"EU","regulation":"Regulation (EC) No 1935/2004 + EU 10/2011","citation":"EC 1935/2004, EU 10/2011","requirements":"Materials must not transfer constituents to food exceeding specific migration limits.","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"}],"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":false,"disposal_guidance":"Silicone is not widely recyclable. Regular waste when worn.","hazardous_waste":false,"expected_lifespan":"3-5_years"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000668","name":"D4 (tetramethylcyclotetrasiloxane)","role":"manufacturing_residual","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000668","compound_name":null,"role":"manufacturing_residual","typical_concentration":"trace"}],"identifiers":{"common_names":["reusable silicone food storage bags"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Stasher","manufacturer":"Stasher","market_position":"premium","notable":"Reusable silicone food storage bags"},{"brand":"Zip-Top","manufacturer":"Zip-Top","market_position":"premium","notable":"Reusable silicone containers"},{"brand":"Ziploc","manufacturer":"SC Johnson","market_position":"mass_market","notable":"Disposable 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":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"FDA 21 CFR Parts 170-199 (21 CFR 170-199)","jurisdiction":"USA","citation":"21 CFR 170-199","id":"src_131cd3dc"},{"type":"regulation","title":"Regulation (EC) No 1935/2004 + EU 10/2011 (EC 1935/2004, EU 10/2011)","jurisdiction":"EU","citation":"EC 1935/2004, EU 10/2011","id":"src_f722b4a3"},{"id":"src_001","type":"database","title":"PubChem Compound CID 10913","url":"https://pubchem.ncbi.nlm.nih.gov/compound/10913","accessed":"2026-03-12","notes":"Chemical identity, properties, safety data","inherited_from_compound":"hq-c-org-000668"},{"id":"src_002","type":"epa","title":"EPA CompTox Chemicals Dashboard — DTXSID1027184","url":"https://comptox.epa.gov/dashboard/chemical/details/DTXSID1027184","accessed":"2026-03-12","notes":"Hazard, exposure, and toxicity data","inherited_from_compound":"hq-c-org-000668"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-13T22:22:06.652Z"}}