{"hq_id":"hq-p-spe-000063","name":"Craft and Hobby Resin (Epoxy and UV-Cure)","category":{"primary":"specialty","secondary":"craft","tags":["epoxy resin","UV resin","BPA","HEMA","craft","hobby","sensitization"]},"product_tier":"SPE","overall_risk_level":"moderate_to_high","description":"Two-part epoxy resin and single-part UV-cure resin used for jewelry, coasters, art, and DIY projects. Epoxy resin Part A contains bisphenol A diglycidyl ether (BADGE/DGEBA) — a BPA derivative and skin sensitizer. Part B hardener contains amines (strong irritants). UV-cure resin contains acrylate monomers (HEMA, IBOA) — same sensitizers as gel nail polish. Home crafters typically work without ventilation, gloves, or UV protection.","synthesis":{"derived_risk_level":"low","synthesis_confidence":0.549,"synthesis_method":"compound_composition","context_used":"human_adult","context_source":"product_users","exposure_modifier":1.1,"vulnerability_escalated":false,"escalation_reason":null,"compounds_resolved":3,"compounds_total":3,"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":"home crafters without PPE awareness","overall_risk":"moderate_to_high","primary_concerns":["Epoxy resin (BADGE) sensitization — irreversible, affects future medical/dental epoxy use","UV resin acrylate (HEMA) sensitization — same as gel nail allergy","Home crafters typically lack ventilation, gloves, and UV protection","Amine hardener is a strong skin and respiratory irritant"],"exposure_routes":"Dermal contact with uncured resin; inhalation of vapors and sanding dust"},"exposure":{"routes":["dermal","inhalation"],"contact_types":["skin_prolonged","inhalation"],"users":["adult"],"duration":"hours","frequency":"weekly","scenarios":["Mixing and pouring epoxy resin without gloves (dermal sensitization)","Sanding cured resin without respiratory protection (dust inhalation)","UV resin dripping on skin during jewelry making (acrylate sensitization)","Resin off-gassing in unventilated craft room"],"notes":"Epoxy sensitization is irreversible — once sensitized, any future epoxy contact causes severe dermatitis. Cross-sensitization with medical and dental epoxies means craft sensitization has healthcare implications. PPE: nitrile gloves (not latex), ventilation, UV-blocking safety glasses for UV resin."},"consumer_guidance":{"usage_warning":"ALWAYS wear nitrile gloves (not latex) when handling uncured resin. Work in ventilated space. Wear UV-blocking safety glasses for UV resin. Never sand cured resin without N95+ respiratory protection. Epoxy sensitization is irreversible.","safer_alternatives":["Bio-based epoxy resins (lower BADGE content)","Water-based epoxy alternatives for non-structural applications","Polymer clay as resin alternative for jewelry/art"],"red_flags":[{"indicator":"Product involved in active regulatory review or litigation","meaning":"Safety profile under scrutiny.","action":"Monitor regulatory developments and consider alternatives."}],"green_flags":[{"indicator":"Third-party testing or regulatory certification","meaning":"Independent safety verification.","verification":"Check for relevant certifications."}],"what_to_ask":[{"question":"What is the current regulatory status of this product?","why_it_matters":"Active regulatory review may indicate emerging safety concerns.","good_answer":"Compliant with current standards and monitoring developments.","bad_answer":"No awareness of regulatory status."}],"alternatives":[{"name":"Bio-based epoxy resins","notes":"lower BADGE content"},{"name":"Water-based epoxy alternatives for non-structural applications","notes":"Alternative"},{"name":"Polymer clay as resin alternative for jewelry/art","notes":"Alternative"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"OSHA Hazard Communication Standard","citation":"29 CFR 1910.1200","requirements":"SDS required for resin products. Consumer craft products exempt from OSHA but SDS should be available.","compliance_status":null,"effective_date":null,"enforcing_agency":"OSHA","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":"Cured resin: regular waste (inert). Uncured resin: hazardous waste.","hazardous_waste":true,"expected_lifespan":"varies"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000648","name":"BADGE (bisphenol A diglycidyl ether)","role":"resin_base","concentration_pct":"60-80"},{"hq_id":"hq-c-org-000006","name":"Bisphenol A","role":"monomer_residual","concentration_pct":"trace"},{"hq_id":"hq-c-org-000708","name":"2-Hydroxyethyl methacrylate (HEMA)","role":"UV_resin_monomer","concentration_pct":"20-40"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000648","compound_name":null,"role":"resin_base","typical_concentration":"60-80%"},{"hq_id":"hq-c-org-000006","compound_name":null,"role":"monomer_residual","typical_concentration":"trace"},{"hq_id":"hq-c-org-000708","compound_name":null,"role":"UV_resin_monomer","typical_concentration":"20-40%"}],"identifiers":{"common_names":["craft and hobby resin (epoxy and uv-cure)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"OPI GelColor","manufacturer":"Coty","market_position":"premium","notable":"Professional gel nail system"},{"brand":"Sally Hansen Miracle Gel","manufacturer":"Coty","market_position":"mass_market","notable":"At-home gel polish"},{"brand":"Gelish","manufacturer":"Hand & Nail Harmony","market_position":"premium","notable":"Professional soak-off gel polish"}],"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 Hazard Communication Standard (29 CFR 1910.1200)","jurisdiction":"USA","citation":"29 CFR 1910.1200","id":"src_d7cba04a"},{"id":"src_001","type":"database","title":"PubChem Compound CID 2286","url":"https://pubchem.ncbi.nlm.nih.gov/compound/2286","accessed":"2026-03-12","notes":"Chemical identity, properties, safety data","inherited_from_compound":"hq-c-org-000648"},{"id":"src_002","type":"epa","title":"EPA CompTox Chemicals Dashboard — DTXSID6024624","url":"https://comptox.epa.gov/dashboard/chemical/details/DTXSID6024624","accessed":"2026-03-12","notes":"Hazard, exposure, and toxicity data","inherited_from_compound":"hq-c-org-000648"},{"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"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:23:21.767Z"}}