{"hq_id":"hq-p-spe-000050","name":"E-Cigarette and Vape Liquid","category":{"primary":"specialty","secondary":"nicotine","tags":["e-cigarette","vape","propylene glycol","diacetyl","formaldehyde","nicotine","EVALI"]},"product_tier":"SPE","overall_risk_level":"high","description":"Electronic nicotine delivery systems (ENDS) and vape liquids containing propylene glycol, vegetable glycerin, nicotine, and flavoring chemicals. Heating produces formaldehyde, acrolein, and metal nanoparticles from coil degradation. Diacetyl and 2,3-pentanedione in flavored liquids cause bronchiolitis obliterans ('popcorn lung'). EVALI outbreak (2019) linked to vitamin E acetate in THC cartridges.","synthesis":{"derived_risk_level":"moderate","synthesis_confidence":0.679,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.265,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":4,"compounds_total":4,"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":"adolescents (brain development), pregnant women","overall_risk":"high","primary_concerns":["Formaldehyde and acrolein from thermal degradation of propylene glycol","Metal nanoparticle inhalation from coil degradation (lead, chromium, nickel)","Diacetyl in flavored liquids — bronchiolitis obliterans risk","Nicotine addiction in adolescent brain development"],"exposure_routes":"Deep lung inhalation of heated aerosol"},"exposure":{"routes":["inhalation"],"contact_types":["inhalation"],"users":["adult","child"],"duration":"hours","frequency":"daily","scenarios":["Daily vaping (100-500 puffs/day for heavy users)","Flavored vape liquid appeal to adolescents","High-power devices generating more formaldehyde and acrolein","Secondhand vape aerosol exposure in enclosed spaces"],"notes":"FDA regulates e-cigarettes as tobacco products but ingredient disclosure is limited. Formaldehyde generation increases dramatically at high wattage settings (dry puff conditions). Adolescent vaping rate: 14% of US high school students (2022). Lead and other metals leach from heating coils into aerosol."},"consumer_guidance":{"usage_warning":"Vaping is not safe — it is less harmful than combustible cigarettes but carries significant respiratory and cardiovascular risks. Do not vape if you do not already use nicotine. Never use THC cartridges from unregulated sources. Do not modify devices for higher power.","safer_alternatives":["FDA-approved nicotine replacement (patch, gum, lozenge)","Complete nicotine cessation","If transitioning from cigarettes: use lowest-power regulated device with unflavored liquid"],"alternatives":[{"name":"FDA-approved nicotine replacement","notes":"patch, gum, lozenge"},{"name":"Complete nicotine cessation","notes":"Safer alternative to conventional products"},{"name":"If transitioning from cigarettes: use lowest-power regulated device with unflavored liquid","notes":"Safer alternative to conventional products"}],"red_flags":[{"indicator":"Use without recommended protective equipment","meaning":"Exposure to hazardous chemicals or particles without protection.","action":"Always use appropriate PPE as specified by manufacturer or SDS."}],"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":"OSHA workplace safety","citation":"29 CFR 1910","requirements":"PELs, SDS requirements, PPE mandates.","compliance_status":null,"effective_date":null,"enforcing_agency":"OSHA","penalties":null,"source_ref":null},{"jurisdiction":"USA","regulation":"EPA (TSCA/RCRA/FIFRA as applicable)","citation":null,"requirements":"Chemical reporting, hazardous waste, pesticide registration as applicable.","compliance_status":null,"effective_date":null,"enforcing_agency":"EPA","penalties":null,"source_ref":null}],"certifications":[],"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":"E-waste for device. Liquid: do not pour down drain — absorb in cat litter or coffee grounds, then regular waste. Batteries: battery recycling.","hazardous_waste":true,"expected_lifespan":"months"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000094","name":"Propylene glycol","role":"carrier_liquid","concentration_pct":"50-70"},{"hq_id":"hq-c-org-000011","name":"Formaldehyde","role":"thermal_degradation","concentration_pct":"trace"},{"hq_id":"hq-c-org-000035","name":"Acrolein","role":"thermal_degradation","concentration_pct":"trace"},{"hq_id":"hq-c-ino-000001","name":"Lead (Pb)","role":"coil_degradation","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000094","compound_name":null,"role":"carrier_liquid","typical_concentration":"50-70%"},{"hq_id":"hq-c-org-000011","compound_name":null,"role":"thermal_degradation","typical_concentration":"trace"},{"hq_id":"hq-c-org-000035","compound_name":null,"role":"thermal_degradation","typical_concentration":"trace"},{"hq_id":"hq-c-ino-000001","compound_name":null,"role":"coil_degradation","typical_concentration":"trace"}],"identifiers":{"common_names":["e-cigarette and vape liquid"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"JUUL","manufacturer":"JUUL Labs","market_position":"mass_market","notable":"Leading pod-based e-cigarette"},{"brand":"Vuse","manufacturer":"Reynolds American","market_position":"mass_market","notable":"Tobacco-company vape brand"},{"brand":"SMOK","manufacturer":"Shenzhen IVPS","market_position":"mass_market","notable":"Popular open-system vape brand"}],"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":"OSHA workplace safety (29 CFR 1910)","jurisdiction":"USA","citation":"29 CFR 1910","id":"src_0358de26"},{"type":"regulation","title":"EPA (TSCA/RCRA/FIFRA as applicable)","jurisdiction":"USA","id":"src_e10425f0"},{"id":"fda_pg_cat_food_ban","type":"regulatory","title":"US FDA: Propylene Glycol in Animal Food — Final Rule Prohibiting Use in Cat Food (21 CFR 582.4666) and GRAS Status for Dog Food","year":1996,"inherited_from_compound":"hq-c-org-000094"},{"id":"aspca_apcc_pg","type":"veterinary","title":"ASPCA Animal Poison Control Center: Propylene Glycol — Heinz Body Anemia Risk in Cats and Species Differences in Erythrocyte Sensitivity","year":2022,"inherited_from_compound":"hq-c-org-000094"},{"id":"iarc_100f_form","type":"regulatory","title":"IARC Monographs Volume 100F: Formaldehyde","year":2012,"inherited_from_compound":"hq-c-org-000011"},{"id":"epa_form_iris","type":"regulatory","title":"US EPA IRIS Assessment: Formaldehyde (draft)","year":2010,"inherited_from_compound":"hq-c-org-000011"},{"id":"iarc_63_acrolein","type":"regulatory","title":"IARC Monographs Volume 63: Acrolein","year":1995,"inherited_from_compound":"hq-c-org-000035"},{"id":"epa_acrolein_iris","type":"regulatory","title":"US EPA IRIS: Acrolein — Provisional Toxicological Review (External Review Draft)","year":2003,"inherited_from_compound":"hq-c-org-000035"},{"id":"src_001","type":"cdc","title":"CDC - Lead Poisoning Prevention","url":"https://www.cdc.gov/lead-prevention/","accessed":"2026-01-13","relevance":"Blood lead reference values, no safe level doctrine","inherited_from_compound":"hq-c-ino-000001"},{"id":"src_002","type":"who","title":"WHO - Lead Poisoning Fact Sheet","url":"https://www.who.int/news-room/fact-sheets/detail/lead-poisoning-and-health","year":2024,"accessed":"2026-01-13","relevance":"Global burden statistics, health effects","inherited_from_compound":"hq-c-ino-000001"},{"type":"regulatory","title":"US Food and Drug Administration (FDA)","jurisdiction":"USA","id":"src_82d1cfcd","extraction":"description_reference"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:24:00.946Z"}}