{"hq_id":"hq-p-hom-000049","name":"Consumer Craft Epoxy Resin Kits (Resin Art, River Tables, Jewelry Casting)","category":{"primary":"household","secondary":"","tags":[]},"product_tier":"HOM","overall_risk_level":"high","description":"A hobbyist purchases a consumer epoxy resin kit marketed as 'beginner-friendly' and 'safe DIY.' The instructions include basic precautions: wear gloves, work in ventilation. What the instructions do not state: the gloves will likely be removed when the surface hardens at 24 hours and the interior is still uncured.","synthesis":{"derived_risk_level":"moderate","synthesis_confidence":0.656,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":0.935,"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":{"critical_concern":"10M+ US hobbyists use consumer epoxy resin kits without occupational health guidance. Type IV sensitization to BADGE occurs in 2–8% of users — permanent sensitization develops from single/limited exposure. Kit instructions state 'wear gloves' but omit: (1) permanent sensitization possible; (2) ventilation critical for amine asthma; (3) incomplete curing at 24 hours. 'Fully cured' marketing is misleading — interior remains uncured for 48+ hours, retaining bioavailable BADGE.","key_hazards":["BADGE Type IV sensitization — irreversible allergic contact dermatitis; sensitization rate 2–8% in regular users","Aliphatic amine hardener sensitization — permanent respiratory sensitization causing occupational asthma","Uncured interior resin at 24-hour demolding — direct BADGE/hardener exposure during critical sensitization window","Food-contact use — consumer resins used as cutting boards/serving trays despite not being food-certified; potential BPA leaching","No labeling of permanent sensitization risk or ventilation necessity"],"overall_risk":"high","primary_concerns":[],"sensitive_populations":"","exposure_routes":""},"exposure":{"routes":["dermal"],"contact_types":["dermal","inhalation"],"users":["adult","child"],"duration":"minutes","frequency":"weekly","scenarios":["Incidental mouthing or hand-to-mouth transfer by children"],"notes":"Exposure to Consumer Craft Epoxy Resin Kits (Resin Art, River Tables, Jewelry Casting) occurs via dermal. Children and infants face higher exposure per body weight due to developing detoxification systems, higher surface-area-to-weight ratio, and behavioral factors (mouthing, crawling)."},"consumer_guidance":{"red_flags":[{"indicator":"Contains known carcinogens","meaning":"N-Nitrosodi-n-butylamine, Epichlorohydrin — classified by IARC or NTP as carcinogenic or probably carcinogenic to humans","action":"Minimize exposure; consider alternatives; follow use guidelines strictly"},{"indicator":"Overall risk level: high","meaning":"Multiple hazard pathways identified for this product category","action":"Limit exposure duration and frequency; use protective measures where applicable"}],"green_flags":[{"indicator":"EPA Safer Choice certified","meaning":"Meets EPA criteria for safer chemical ingredients","verification":"Look for EPA Safer Choice label on packaging"}],"what_to_ask":[{"question":"Is this product safe for use around children and pets?","why_it_matters":"Many household chemicals are formulated for adult use; children and pets have higher exposure per body weight and developing organ systems"},{"question":"Has this product been tested for carcinogenic compounds?","why_it_matters":"Products in this category may contain or release carcinogenic compounds; independent testing provides verification beyond manufacturer claims"}],"alternatives":[{"name":"UV Resin (uncatalyzed epoxy)","notes":"Lower VOC emissions; cures quickly with UV light; reduced respiratory hazard risk"},{"name":"Pre-made resin pour kits with pre-measured doses","notes":"Reduces mixing errors and vapor exposure from handling bulk chemicals"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"Consumer Product Safety Act (CPSA) + FHSA","citation":null,"requirements":"Household products must not present unreasonable risk of injury. Federal Hazardous Substances Act requires labeling of hazardous household products (corrosive, flammable, toxic, irritant).","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null},{"jurisdiction":"USA","regulation":"EPA Safer Choice / Design for the Environment","citation":null,"requirements":"Voluntary program. Products meeting Safer Choice criteria can display the label. Requires disclosure of all ingredients and safer chemical alternatives.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null},{"jurisdiction":"EU","regulation":"CLP Regulation (EC) No 1272/2008","citation":null,"requirements":"Classification, labelling, and packaging of hazardous chemical products. GHS-aligned hazard communication. Signal words, pictograms, and precautionary statements required.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":null}],"certifications":[{"name":"CPSC General Safety","issuer":"CPSC","standard":"Consumer Product Safety Act","scope":"General consumer product safety requirements"}],"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":null,"disposal_guidance":"Varies by material; check local recycling guidelines","hazardous_waste":false,"expected_lifespan":"1-3_years"},"formulation":{"form":"solid","key_ingredients":[{"hq_id":null,"name":"Lead or cadmium (in legacy jewelry)","role":"base_material","concentration_pct":"5-50"},{"hq_id":null,"name":"Nickel-plated base metal","role":"coating","concentration_pct":"50-95"},{"hq_id":null,"name":"Paint or enamel coating","role":"colorant","concentration_pct":"1-5"}],"certifications":[]},"materials":{"common":[{"material_id":"hq-m-chm-000065","material_name":"Consumer epoxy resin and hardener system","component":"Two-component epoxy system for DIY craft projects","prevalence":"common"}],"concerning":[{"material_id":"hq-m-chm-000065","concern":"BADGE (bisphenol A diglycidyl ether) — Type IV contact sensitizer; sensitization rate 2–8% in regular users; sensitization is permanent and irreversible; all future epoxy exposure triggers allergic contact dermatitis","compounds_of_concern":["hq-c-org-000694"],"source_refs":[]},{"material_id":"hq-m-chm-000065","concern":"Aliphatic amine hardeners (DETA, TETA, cycloaliphatic amines) — dermal sensitizers and respiratory sensitizers; cause Type I asthma in exposed workers; sensitization is irreversible","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-chm-000065","concern":"Epichlorohydrin (IARC 2A) — residual in resin component; acute inhalation toxicity and skin irritant","compounds_of_concern":["hq-c-org-000252"],"source_refs":[]},{"material_id":"hq-m-chm-000065","concern":"Uncured vs. 'fully cured' — consumer resin kits often incompletely cured at 24 hours (surface hard, interior tacky); hand contact during demolding = direct uncured BADGE/DETA exposure within critical sensitization window (48 hours post-mixing)","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-chm-000065","concern":"Food-contact hazard — consumer resin used as cutting boards, serving trays, cup coatings despite not being food-certified; potential BADGE/DETA leaching into food and saliva","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-chm-000065","concern":"Occupational gap — 10M+ US hobbyist resin users without occupational health guidance; no warning on kit labels about permanent sensitization risk; ventilation instructions absent or inadequate","compounds_of_concern":[],"source_refs":[]},{"material_id":"hq-m-chm-000065","concern":"Potential contaminant: Bisphenol A (BPA)","compounds_of_concern":["hq-c-org-000006"],"source_refs":[]},{"material_id":"hq-m-chm-000065","concern":"Potential contaminant: Epichlorohydrin","compounds_of_concern":["hq-c-org-000403"],"source_refs":[]}],"preferred":[{"material_id":null,"material_name":"Water-based epoxy systems (reduced amine hazard)","why_preferred":"","tradeoffs":"Lower sensitization potential; reduced performance compared to solvent-based; higher cost; limited color/finish options"},{"material_id":"hq-m-str-000002","material_name":"Polyester resin (alternative to epoxy)","why_preferred":"","tradeoffs":"Lower cost; different hazard profile (styrene vapor); similar sensitization risk; different curing properties","hq_id":"hq-m-str-000002"},{"material_id":null,"material_name":"UV-curable resin (acrylate-based)","why_preferred":"","tradeoffs":"No solvent/vapor exposure; acrylate sensitization (5–15% vs. 2–8% for BADGE); requires UV lamp; cross-reactivity with acrylate adhesives"}]},"compound_composition":[{"hq_id":"hq-c-org-000694","compound_name":"BADGE (Bisphenol A diglycidyl ether) — resin component","role":"base","typical_concentration":null},{"hq_id":"hq-c-org-000252","compound_name":"N-Nitrosodi-n-butylamine (NDBA)","role":"base","typical_concentration":null},{"hq_id":"hq-c-org-000006","compound_name":"Bisphenol A","role":"contaminant","typical_concentration":null},{"hq_id":"hq-c-org-000403","compound_name":"Epichlorohydrin","role":"contaminant","typical_concentration":null}],"identifiers":{"common_names":["epoxy resin kit","resin art","river table resin","resin casting","beginner resin"],"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":"Professional Brand","manufacturer":"Professional Products Co","market_position":"professional","notable":"Professional/salon-grade option"},{"brand":"Specialty Eco-Brand","manufacturer":"Natural Products Ltd","market_position":"premium","notable":"Sustainable/natural product line"}],"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":"BADGE Sensitization in Epoxy Workers — Type IV Hypersensitivity","year":2010},{"type":"regulation","title":"Consumer Product Safety Act (CPSA) + FHSA","jurisdiction":"USA","id":"src_5f50aaf4"},{"type":"regulation","title":"EPA Safer Choice / Design for the Environment","jurisdiction":"USA","id":"src_44bbb086"},{"type":"regulation","title":"CLP Regulation (EC) No 1272/2008","jurisdiction":"EU","id":"src_74945c54"},{"id":"src_002","type":"reference","title":"ATSDR Toxicological Profile — CAS 9005-25-8","url":"https://www.atsdr.cdc.gov/toxprofiledocs/index.html","notes":"Toxicological profile and health effects summary","inherited_from_compound":"hq-c-org-000694"},{"id":"iarc_nitrosamines_v17_1978","type":"regulatory","title":"IARC Monographs Volume 17: Some N-Nitroso Compounds — NDMA Group 2A, NDEA Group 2A, NPYR Group 2B, NPIP Group 2B, NDBA Group 2B, NMEA Group 2B, NMBA Group 2B, N-Nitrosomorpholine Group 2B (1978, updated in Supplement 7, 1987)","year":1978,"inherited_from_compound":"hq-c-org-000252"},{"id":"efsa_nitrosamines_2023","type":"regulatory","title":"EFSA Panel on Contaminants in the Food Chain (CONTAM): Scientific Opinion on the Risk for Human Health Related to the Presence of Nitrosamines in Food — Group MOE approach for 10 priority nitrosamines in processed meat, fish, and other food categories; benchmark MOE 10,000 (2023)","year":2023,"inherited_from_compound":"hq-c-org-000252"},{"type":"regulatory","citation":"EFSA CEP Panel. Re-evaluation of the risks to public health related to the presence of bisphenol A (BPA) in foodstuffs. EFSA Journal 2023;21(4):6857.","url":"https://efsa.onlinelibrary.wiley.com/doi/10.2903/j.efsa.2023.6857","date":"2023-04-19","id":"efsa_2023","inherited_from_compound":"hq-c-org-000006"},{"type":"regulatory","citation":"ECHA Member State Committee. Identification of BPA as SVHC.","date":"2017-06-16","id":"echa_svhc_2017","inherited_from_compound":"hq-c-org-000006"},{"id":"niosh_ech_carcinogen","type":"regulatory","title":"NIOSH: Epichlorohydrin — Occupational Carcinogen Designation; REL Ceiling 0.5 ppm; Skin Sensitization; Epoxy Resin Industry Health Hazards","year":1976,"inherited_from_compound":"hq-c-org-000403"},{"id":"atsdr_ech_toxprofile","type":"regulatory","title":"ATSDR Toxicological Profile: Epichlorohydrin — Carcinogenicity, Genotoxicity, Dermal Absorption, Respiratory Toxicity, Occupational Exposure, Environmental Fate","year":1992,"inherited_from_compound":"hq-c-org-000403"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:27:35.981Z"}}