{"hq_id":"hq-p-bdy-000111","name":"Nail Gel Polish (UV/LED Cured)","category":{"primary":"personal_care","secondary":"nail_care","tags":["gel polish","HEMA","UV cure","acrylate","photoinitiator","nail allergy"]},"product_tier":"BDY","overall_risk_level":"moderate_to_high","description":"UV or LED-cured gel nail polish containing acrylate monomers (HEMA, di-HEMA TMHDC), photoinitiators, and methacrylate oligomers. HEMA (2-hydroxyethyl methacrylate) is the most common cause of acrylate allergy — prevalence increasing dramatically with at-home gel nail kits. Once sensitized, patients react to all acrylate-containing products (dental composites, medical adhesives, screen protectors). UV lamp exposure adds cumulative UV radiation to hands.","synthesis":{"derived_risk_level":"moderate","synthesis_confidence":0.82,"synthesis_method":"compound_composition","context_used":"human_adult","context_source":"product_users","exposure_modifier":1.1,"vulnerability_escalated":false,"escalation_reason":null,"compounds_resolved":2,"compounds_total":2,"synthesis_date":"2026-03-27","synthesis_version":"1.0.0"},"hazard_summary":{"sensitive_populations":"nail technicians (occupational), at-home gel users","overall_risk":"moderate_to_high","primary_concerns":["HEMA acrylate sensitization — irreversible allergy affecting all future acrylate contact","At-home gel kits with underpowered lamps leaving uncured monomer on skin","Cumulative UV exposure to hands from curing lamps"],"exposure_routes":"Dermal (uncured gel on skin); inhalation (monomer vapor); UV radiation to hands"},"exposure":{"routes":["dermal","inhalation"],"contact_types":["skin_prolonged","inhalation"],"users":["adult","occupational"],"duration":"hours","frequency":"weekly","scenarios":["Gel application contacting skin around nail (sensitization trigger)","Nail technician: daily exposure to uncured gel (occupational)","UV/LED lamp exposure to hands during curing (cumulative UV dose)","At-home gel kit: improper curing leaving uncured acrylate on skin"],"notes":"British Association of Dermatologists 2023: acrylate allergy cases increasing 15-20% annually, driven by at-home gel kits with inadequate curing lamps. Once acrylate-sensitized, patients cannot receive dental composites or acrylic bone cement without reaction. Properly cured gel is inert — the hazard is uncured monomer contacting skin."},"consumer_guidance":{"usage_warning":"Avoid skin contact with uncured gel at all costs. Use professional-grade UV/LED lamp with adequate wattage for full cure. Wear UV-protective gloves with fingertip cutouts during curing. If skin contact occurs, remove immediately with alcohol — do not cure gel on skin.","safer_alternatives":["Professional salon application (trained technicians, proper lamps)","HEMA-free gel polish brands (Madam Glam, Mylee)","Traditional nail polish (no UV curing, no acrylate sensitization risk)"],"red_flags":[{"indicator":"Product causes skin irritation, redness, or rash","meaning":"Contact dermatitis or chemical sensitivity.","action":"Discontinue use. Choose fragrance-free, hypoallergenic alternative."}],"green_flags":[{"indicator":"EWG Verified or dermatologist-tested label","meaning":"Meets strict ingredient safety criteria.","verification":"Check EWG Skin Deep database for product rating."}],"what_to_ask":[{"question":"Is this product fragrance-free (not just unscented)?","why_it_matters":"Fragrance is the #1 cause of cosmetic contact dermatitis. Unscented may still contain masking fragrance.","good_answer":"Fragrance-free — no fragrance ingredients at all.","bad_answer":"Unscented (may contain masking fragrance)."}],"alternatives":[{"name":"Professional salon application","notes":"trained technicians, proper lamps"},{"name":"HEMA-free gel polish brands","notes":"Madam Glam, Mylee"},{"name":"Traditional nail polish","notes":"no UV curing, no acrylate sensitization risk"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"FDA Federal Food, Drug, and Cosmetic Act (Cosmetics)","citation":"21 U.S.C. 361-364","requirements":"Cosmetics must not be adulterated or misbranded. No pre-market approval required (except color additives). Fragrance ingredients exempt from individual disclosure.","compliance_status":null,"effective_date":null,"enforcing_agency":"FDA","penalties":null,"source_ref":null},{"jurisdiction":"EU","regulation":"EU Cosmetics Regulation (EC) No 1223/2009","citation":"EC 1223/2009","requirements":"All cosmetic ingredients must be safety-assessed before market. 1,600+ banned substances. Full ingredient disclosure required (INCI). CMR substances prohibited.","compliance_status":null,"effective_date":null,"enforcing_agency":"European Commission","penalties":null,"source_ref":null},{"jurisdiction":"USA -- California","regulation":"California Proposition 65","citation":"CA Health & Safety Code 25249.5","requirements":"Products containing listed chemicals require warnings.","compliance_status":null,"effective_date":null,"enforcing_agency":"OEHHA","penalties":null,"source_ref":null}],"certifications":[{"name":"EWG Verified","issuer":"Environmental Working Group","standard":"EWG Verified Mark","scope":"Meets EWG strictest health criteria for personal care products"}],"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":"Regular waste for cured gel. Uncured gel: do not pour down drain.","hazardous_waste":false,"expected_lifespan":"months"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000708","name":"2-Hydroxyethyl methacrylate (HEMA)","role":"monomer","concentration_pct":"20-35"},{"hq_id":"hq-c-org-000701","name":"Methyl methacrylate (MMA)","role":"acrylate_class","concentration_pct":"5-15"}],"certifications":[]},"materials":{"common":[{"material_id":null,"material_name":"Primary formulation for nail gel polish (uv/led cured)","component":"main product","prevalence":"common","notes":"Standard personal care product formulation."}],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000708","compound_name":null,"role":"monomer","typical_concentration":"20-35%"},{"hq_id":"hq-c-org-000701","compound_name":null,"role":"acrylate_class","typical_concentration":"5-15%"}],"identifiers":{"common_names":["nail gel polish (uv/led cured)"],"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"}],"sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"FDA Federal Food, Drug, and Cosmetic Act (Cosmetics) (21 U.S.C. 361-364)","jurisdiction":"USA","citation":"21 U.S.C. 361-364","id":"src_d6e8aa83"},{"type":"regulation","title":"EU Cosmetics Regulation (EC) No 1223/2009 (EC 1223/2009)","jurisdiction":"EU","citation":"EC 1223/2009","id":"src_dc378692"},{"type":"regulation","title":"California Proposition 65 (CA Health & Safety Code 25249.5)","jurisdiction":"USA -- California","citation":"CA Health & Safety Code 25249.5","id":"src_fe1d5adc"},{"id":"src_001","type":"database","title":"PubChem Compound CID 13360","url":"https://pubchem.ncbi.nlm.nih.gov/compound/13360","accessed":"2026-03-12","notes":"Chemical identity, properties, safety data","inherited_from_compound":"hq-c-org-000708"},{"id":"src_002","type":"epa","title":"EPA CompTox Chemicals Dashboard — DTXSID7022128","url":"https://comptox.epa.gov/dashboard/chemical/details/DTXSID7022128","accessed":"2026-03-12","notes":"Hazard, exposure, and toxicity data","inherited_from_compound":"hq-c-org-000708"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-02T18:19:59.151Z"}}