{"hq_id":"hq-p-spe-000040","name":"Windshield washer fluid (methanol-based)","category":{"primary":"specialty","secondary":"automotive","tags":["washer fluid","methanol","automotive","windshield"]},"product_tier":"SPE","overall_risk_level":"extreme","description":"Windshield cleaning fluid containing 20-50% methanol as antifreeze/solvent, with surfactants and blue dye. Methanol is acutely toxic: ingestion of 10-30 mL can cause permanent blindness; 60-240 mL is fatal. Methanol is metabolized by alcohol dehydrogenase to formaldehyde and formic acid, which damages the optic nerve and causes metabolic acidosis. Significant dermal absorption also occurs. Blue color and liquid form lead to mistaken identity as sports drinks (especially by children).","synthesis":{"derived_risk_level":"severe","synthesis_confidence":0.5,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.1,"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":"child, adult","overall_risk":"extreme","primary_concerns":["Lethal ingestion: 60-240 mL fatal to adults; less for children","Permanent blindness: formic acid destroys optic nerve; 10-30 mL causes blindness","Dermal absorption: methanol penetrates skin readily","Delayed symptoms: 12-24 hour latent period before onset"],"exposure_routes":"ingestion (primary), dermal absorption, inhalation of vapor"},"exposure":{"routes":["ingestion","dermal","inhalation"],"contact_types":["oral_direct","skin_direct","inhalation"],"users":["adult","child"],"duration":"acute","frequency":"single_exposure","scenarios":["Child drinking blue fluid mistaken for sports drink","Skin absorption during refilling","Inhalation of methanol vapor during warm-weather use","Intentional ingestion (alcohol substitute)"],"notes":"Methanol poisoning has 12-24 hour latent period before symptoms. By the time vision loss occurs, permanent damage is done."},"consumer_guidance":{"red_flags":[{"indicator":"Blue liquid stored in garage without child-resistant cap","meaning":"Methanol poisoning risk — resembles sports drink","action":"Store locked; consider ethanol-based alternatives"}],"green_flags":[],"what_to_ask":[],"alternatives":[{"name":"Ethanol-based washer fluid","notes":"Lower toxicity than methanol; available in some markets; not universally available"},{"name":"Concentrated washer tablets (add to water)","notes":"Minimal methanol content; reduces storage of large liquid containers"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"CPSC child-resistant packaging (some states)","citation":null,"requirements":"Some jurisdictions require child-resistant caps on windshield washer fluid.","compliance_status":null,"effective_date":null,"enforcing_agency":"CPSC","penalties":null,"source_ref":null}],"certifications":[],"labeling":{"required_disclosures":["Methanol content","Poison warning","Keep from children"],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":"DANGER","pictograms":["skull_crossbones","health_hazard","flame"],"hazard_statements":["Fatal if swallowed","Causes damage to optic nerve/eyes","Flammable liquid"],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":"No federal requirement for child-resistant packaging on washer fluid","notes":null},"lifecycle":{"recyclable":false,"disposal_guidance":"Hazardous waste disposal","hazardous_waste":true,"expected_lifespan":"1-3_years"},"formulation":{"form":"liquid","key_ingredients":[{"hq_id":"hq-c-org-000045","name":"Methanol (methyl alcohol)","role":"antifreeze_solvent","concentration_pct":"20-50"},{"hq_id":null,"name":"Anionic surfactants","role":"cleaning_agent","concentration_pct":"0.5-2"},{"hq_id":null,"name":"Water","role":"diluent","concentration_pct":"48-78"},{"hq_id":null,"name":"Blue dye (FD&C Blue No. 1)","role":"colorant","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000045","compound_name":"Methanol","role":"antifreeze_solvent","typical_concentration":null}],"identifiers":{"common_names":["washer fluid","windshield washer","wiper fluid","screen wash"],"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_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":"2026-03-24"},{"type":"regulation","title":"CPSC child-resistant packaging (some states)","jurisdiction":"USA","id":"src_f4bb6ac6"},{"id":"atsdr_methanol","type":"report","title":"ATSDR Toxicological Profile for Methanol","year":1999,"inherited_from_compound":"hq-c-org-000045"},{"id":"cdc_methanol","type":"report","title":"CDC: Methanol Toxicity — Clinical and Emergency Response Guidance","year":2020,"inherited_from_compound":"hq-c-org-000045"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-24","timestamp":"2026-05-14T01:23:46.160Z"}}