{"hq_id":"hq-p-hom-000132","name":"Rubber cement (solvent-based adhesive)","category":{"primary":"household","secondary":"adhesives","tags":["rubber cement","n-hexane","adhesive","solvent","school supplies","neurotoxic"]},"product_tier":"HOM","overall_risk_level":"moderate_to_high","description":"Solvent-based rubber cement containing natural or synthetic rubber dissolved in n-hexane and/or heptane. Used in arts/crafts, paper mounting, and office applications. n-Hexane is neurotoxic — chronic exposure causes peripheral neuropathy (hexane neuropathy) through its metabolite 2,5-hexanedione, which crosslinks neurofilament proteins. Heptane is less neurotoxic but still a CNS depressant. Both solvents are highly flammable and have significant abuse potential as inhalants. Use in schools and by children/adolescents raises particular concern for both neurotoxicity and intentional inhalant abuse.","synthesis":{"derived_risk_level":"high","synthesis_confidence":0.5,"synthesis_method":"compound_composition","context_used":"human_teen","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, adolescent","overall_risk":"moderate-high","primary_concerns":["Neurotoxicity: n-hexane causes peripheral neuropathy with chronic exposure","Inhalant abuse: highly abusable solvent; leading cause of sudden sniffing death syndrome in adolescents","Flammability: n-hexane/heptane are highly flammable (flash point -26C/-23C)"],"exposure_routes":"inhalation (primary), dermal"},"exposure":{"routes":["inhalation","dermal"],"contact_types":["inhalation","skin_direct"],"users":["adult","child","adolescent"],"duration":"acute_to_chronic","frequency":"periodic","scenarios":["Inhalation of n-hexane vapors during craft use","Extended use in poorly ventilated classroom/studio","Intentional inhalant abuse (huffing)","Dermal contact defatting skin"],"notes":"n-Hexane neuropathy develops with chronic/repeated exposure. Single high-dose abuse episodes can also cause acute CNS depression. Children and adolescents are at highest risk for both neurotoxicity and inhalant abuse."},"consumer_guidance":{"red_flags":[{"indicator":"Contains n-hexane and used in enclosed space","meaning":"Neurotoxic solvent exposure","action":"Switch to heptane-only or water-based adhesive; ensure ventilation"}],"green_flags":[{"indicator":"Heptane-only or water-based formula","meaning":"Eliminates n-hexane neurotoxicity concern","verification":"Check SDS for absence of n-hexane"}],"what_to_ask":[],"alternatives":[{"name":"Glue stick (solid PVA adhesive)","notes":"Zero solvent exposure; safe for children; adequate for most paper bonding"},{"name":"Heptane-based rubber cement","notes":"Heptane is less neurotoxic than n-hexane; still flammable but reduced neuropathy risk"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"OSHA PEL for n-hexane","citation":"29 CFR 1910.1000","requirements":"Workplace exposure limit: 500 ppm (8-hr TWA). ACGIH TLV: 50 ppm.","compliance_status":null,"effective_date":null,"enforcing_agency":"OSHA","penalties":null,"source_ref":null}],"certifications":[],"labeling":{"required_disclosures":["Flammable warning","Ventilation requirements"],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":"DANGER","pictograms":["flame","health_hazard"],"hazard_statements":["Highly flammable liquid and vapor","May cause damage to nervous system through prolonged exposure"],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":"No age-restriction on purchase; widely available to children/adolescents","notes":null},"lifecycle":{"recyclable":false,"disposal_guidance":"Allow to dry; dried product is regular waste. Liquid is flammable waste.","hazardous_waste":true,"expected_lifespan":"1-3_years"},"formulation":{"form":"liquid_adhesive","key_ingredients":[{"hq_id":"hq-c-org-000311","name":"n-Hexane","role":"solvent","concentration_pct":"40-70"},{"hq_id":null,"name":"Heptane","role":"co-solvent","concentration_pct":"10-30"},{"hq_id":null,"name":"Natural/synthetic rubber polymer","role":"adhesive","concentration_pct":"15-25"},{"hq_id":null,"name":"Antioxidant","role":"stabilizer","concentration_pct":"0.1-0.5"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000311","compound_name":"n-Hexane","role":"solvent","typical_concentration":null}],"identifiers":{"common_names":["rubber cement","rubber glue","mounting cement","paper cement"],"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":"OSHA PEL for n-hexane (29 CFR 1910.1000)","jurisdiction":"USA","citation":"29 CFR 1910.1000","id":"src_9161b03f"},{"id":"niosh_nhexane_2019","type":"regulatory","title":"NIOSH Pocket Guide: n-Hexane — REL 50 ppm; 2,5-hexanedione mechanism; peripheral neuropathy; shoe/adhesive industry; food oil extraction; CYP2E1 metabolism; BEI urinary 2,5-HD (2019)","year":2019,"inherited_from_compound":"hq-c-org-000311"},{"id":"osha_nhexane_neuropathy_2014","type":"regulatory","title":"OSHA Hazard Information Bulletin: n-Hexane — occupational neuropathy outbreaks; PEL 500 ppm vs NIOSH 50 ppm; glue-sniffer neuropathy; Chinese electronics worker cases; recovery prognosis (2014)","year":2014,"inherited_from_compound":"hq-c-org-000311"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-24","timestamp":"2026-05-14T01:25:53.698Z"}}