{"hq_id":"hq-p-hom-000177","name":"New Carpet and Carpet Pad Off-Gassing (4-PC, VOCs)","category":{"primary":"household","secondary":"flooring","tags":["carpet","4-PC","4-phenylcyclohexene","VOC","off-gassing","CRI Green Label","new carpet smell"]},"product_tier":"HOM","overall_risk_level":"moderate","description":"New carpet and carpet pad emit volatile organic compounds — the 'new carpet smell.' Primary VOC of concern: 4-phenylcyclohexene (4-PC), a byproduct of SBR latex backing. Also emits styrene, formaldehyde, and acetaldehyde. CRI Green Label Plus certification tests for 13 VOCs. EPA 'new carpet' indoor air complaint was historically one of the most common IAQ complaints received. Off-gassing peaks in first 72 hours and declines over 1-4 weeks.","synthesis":{"derived_risk_level":"moderate_to_high","synthesis_confidence":0.671,"synthesis_method":"compound_composition","context_used":"human_infant","context_source":"product_users","exposure_modifier":1.4,"vulnerability_escalated":true,"escalation_reason":"Infant exposure group","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":"infants and children (floor-level breathing zone), chemically sensitive","overall_risk":"moderate","primary_concerns":["4-PC (4-phenylcyclohexene) — primary 'new carpet smell' compound","Peak VOC emission in first 72 hours of installation","Infants/toddlers at floor level have highest concentration exposure","Carpet pad may emit more VOCs than carpet itself"],"exposure_routes":"Continuous inhalation; infants at floor-level maximum concentration zone"},"exposure":{"routes":["inhalation"],"contact_types":["inhalation"],"users":["adult","child","infant"],"duration":"continuous","frequency":"daily","scenarios":["New carpet installation: peak VOC exposure in first 72 hours","Children and infants at floor level — highest concentration breathing zone","Carpet pad off-gassing (often higher VOC than carpet itself)","Enclosed rooms with new carpet and poor ventilation"],"notes":"CRI Green Label Plus: tests for 13 specific VOCs at installation and after 14 days. Not all carpet is certified — CRI certification is voluntary. Maximize ventilation during and for 72+ hours after installation. Unroll and air out carpet before installation if possible. Carpet pad: choose CRI Green Label Plus pad as well — pad often has higher VOC than carpet."},"consumer_guidance":{"usage_warning":"Choose CRI Green Label Plus certified carpet AND pad. Maximize ventilation during and 72+ hours after installation. Unroll and air out carpet before installation if possible. Consider hard flooring with area rugs (removable, washable, less off-gassing). Avoid new carpet installation in nurseries close to due date.","safer_alternatives":["Hard flooring (hardwood, tile, LVP) with washable area rugs","CRI Green Label Plus certified carpet and pad","Wool carpet with natural backing (lowest synthetic VOC)","Used/vintage carpet (off-gassing complete)"],"red_flags":[{"indicator":"Exposure without required PPE or engineering controls","meaning":"Risk of acute injury or chronic disease.","action":"Follow OSHA requirements and manufacturer PPE recommendations."}],"green_flags":[{"indicator":"OSHA-compliant engineering controls and PPE in use","meaning":"Exposure controlled to below permissible limits.","verification":"Check for OSHA compliance documentation and exposure monitoring records."}],"what_to_ask":[{"question":"What are the OSHA-required exposure controls for this product/process?","why_it_matters":"OSHA PELs and engineering controls are legally mandated.","good_answer":"Specific PEL, engineering controls, and PPE identified and implemented.","bad_answer":"No awareness of OSHA requirements."}],"alternatives":[{"name":"Hard flooring","notes":"hardwood, tile, LVP) with washable area rugs"},{"name":"CRI Green Label Plus certified carpet and pad","notes":"Safer alternative"},{"name":"Wool carpet with natural backing","notes":"lowest synthetic VOC"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"EPA Indoor Air Quality guidance (no mandatory standard)","citation":null,"requirements":"No federal VOC emission standard for carpet. CRI Green Label Plus is voluntary industry certification.","compliance_status":null,"effective_date":null,"enforcing_agency":"EPA (guidance only)","penalties":null,"source_ref":null}],"certifications":[{"name":"CRI Green Label Plus","issuer":"Carpet and Rug Institute","standard":"CRI 104/105","scope":"Tests for 13 VOCs at installation and 14 days. Voluntary certification."}],"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":true,"disposal_guidance":"Carpet recycling programs (CARE). Pad: regular construction waste.","hazardous_waste":false,"expected_lifespan":"5-15_years"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-org-000720","name":"4-Phenylcyclohexene (4-PCH)","role":"SBR_byproduct","concentration_pct":"trace"},{"hq_id":"hq-c-org-000016","name":"Styrene","role":"backing_component","concentration_pct":"trace"},{"hq_id":"hq-c-org-000011","name":"Formaldehyde","role":"off_gas_compound","concentration_pct":"trace"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-org-000720","compound_name":null,"role":"SBR_byproduct","typical_concentration":"trace"},{"hq_id":"hq-c-org-000016","compound_name":null,"role":"backing_component","typical_concentration":"trace"},{"hq_id":"hq-c-org-000011","compound_name":null,"role":"off_gas_compound","typical_concentration":"trace"}],"identifiers":{"common_names":["new carpet and carpet pad off-gassing (4-pc, vocs)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Shaw Floors","manufacturer":"Berkshire Hathaway","market_position":"mass_market","notable":"Major carpet manufacturer"},{"brand":"Mohawk","manufacturer":"Mohawk Industries","market_position":"mass_market","notable":"Carpet and flooring leader"},{"brand":"Interface","manufacturer":"Interface","market_position":"premium","notable":"Sustainable carpet tile brand"}],"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":"EPA Indoor Air Quality guidance (no mandatory standard)","jurisdiction":"USA","id":"src_e3d7e918"},{"id":"src_001","type":"database","title":"PubChem Compound CID 21096","url":"https://pubchem.ncbi.nlm.nih.gov/compound/21096","accessed":"2026-03-12","notes":"Chemical identity, properties, safety data","inherited_from_compound":"hq-c-org-000720"},{"id":"src_002","type":"epa","title":"EPA CompTox Chemicals Dashboard — DTXSID9047176","url":"https://comptox.epa.gov/dashboard/chemical/details/DTXSID9047176","accessed":"2026-03-12","notes":"Hazard, exposure, and toxicity data","inherited_from_compound":"hq-c-org-000720"},{"id":"iarc_121","type":"regulatory","title":"IARC Monographs Volume 121: Styrene, Styrene-7,8-Oxide, and Quinoline","year":2019,"inherited_from_compound":"hq-c-org-000016"},{"id":"epa_styrene_iris","type":"regulatory","title":"US EPA IRIS Assessment: Styrene","year":2010,"inherited_from_compound":"hq-c-org-000016"},{"id":"iarc_100f_form","type":"regulatory","title":"IARC Monographs Volume 100F: Formaldehyde","year":2012,"inherited_from_compound":"hq-c-org-000011"},{"id":"epa_form_iris","type":"regulatory","title":"US EPA IRIS Assessment: Formaldehyde (draft)","year":2010,"inherited_from_compound":"hq-c-org-000011"},{"type":"regulatory","title":"US Environmental Protection Agency (EPA)","jurisdiction":"USA","id":"src_defdd418","extraction":"description_reference"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:25:54.016Z"}}