{"hq_id":"hq-p-hom-000025","name":"Conventional liquid dish soap","category":{"primary":"household","secondary":"dishwashing / kitchen cleaning","tags":["dish soap","dish detergent","liquid dish soap","1,4-dioxane dish soap","Dawn dish soap chemicals","Palmolive chemicals","SLS dish soap","dish soap fragrance","dish soap safety","1,4-dioxane surfactant","dish soap contaminant","dishwashing detergent","hand dish soap","triclosan dish soap","dish soap endocrine disruptor"]},"product_tier":"HOM","overall_risk_level":"low","description":"Conventional liquid dish soaps — Dawn, Palmolive, Ajax, Joy, and store brands — are among the most frequently used household cleaning products, applied to items in direct contact with food and used on bare hands multiple times daily. The chemical concerns in liquid dish soap involve both intentionally added ingredients and manufacturing contaminants: (1) 1,4-dioxane, a probable human carcinogen generated as a manufacturing byproduct during ethoxylation of surfactants including sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES) — not listed on the label because it is a contaminant, not an ingredient; (2) synthetic fragrances containing undisclosed endocrine disruptors and sensitizers; and (3) residual triclosan in some legacy formulations, though triclosan in dish soaps has been substantially phased out since FDA's 2016 ruling. The 1,4-dioxane concern is the most significant: it is generated during manufacturing, cannot be easily removed from the finished product without additional processing steps, and is a probable human carcinogen (Group 2A, IARC) with no safe threshold. New York State enacted a 1,4-dioxane limit (1 ppm) for personal care and cleaning products in 2023 that triggered industry-wide reformulation of major brands, providing a state-level model for federal action.","synthesis":{"derived_risk_level":"moderate_to_high","synthesis_confidence":0.574,"synthesis_method":"compound_composition","context_used":"human_child","context_source":"product_users","exposure_modifier":1.38,"vulnerability_escalated":true,"escalation_reason":"Child exposure group","compounds_resolved":2,"compounds_total":2,"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":"children, pets","overall_risk":"low","primary_concerns":["1,4-Dioxane (CAS 123-91-1; a cyclic ether) is generated as a byproduct during the ethoxylation of surfactants — it is not intentionally added and is not listed on product labels. Dishwashing involves extended bare hand immersion in warm soapy water — 5–15 minutes per session, multiple sessions per day."],"exposure_routes":"skin contact, ingestion"},"exposure":{"routes":["dermal","inhalation"],"contact_types":["skin_contact","ingestion"],"users":["adult","child"],"duration":"acute_repeated","frequency":"daily","scenarios":["Dermal contact during handling of Conventional liquid dish soap (acute_repeated contact)","Inhalation exposure during use of Conventional liquid dish soap","Incidental mouthing or hand-to-mouth transfer by children"],"notes":"Hand dishwashing involves prolonged bare-hand skin contact with warm dish soap solution — typically 5–15 minutes per session, 1–3 sessions daily. The warm water both increases skin permeability and enhances dermal absorption of dissolved compounds. Residual dish soap on incompletely rinsed dishes and utensils provides ingestion exposure. Children who help with dishes, who handle incompletely rinsed items, or who drink from dish-soap-rinsed glasses receive residual ingestion exposure. Daily use over years represents substantial cumulative contact-phase and potential trace ingestion exposure."},"consumer_guidance":{"red_flags":[{"indicator":"No 1,4-dioxane test results available for dish soap, or results above 1 ppm","meaning":"1,4-Dioxane is a probable carcinogen not listed on product labels — it can only be identified through independent testing. Consumer Reports, EWG, and SaferChemicals.org have published testing data on major brands. Products without available test data, or with results above 1 ppm (New York State limit), represent higher-concern formulations. The 1 ppm benchmark is now the industry regulatory threshold in the most progressive US state.","action":"Check EWG's Healthy Cleaning database or Consumer Reports' 1,4-dioxane testing data for your dish soap brand. Switch to a brand with publicly available results below 1 ppm or EPA Safer Choice certification."},{"indicator":"Antibacterial dish soap with undisclosed active ingredient","meaning":"'Antibacterial' dish soaps without a disclosed active ingredient may still contain triclosan. The antimicrobial benefit of triclosan in a rinse-off dish soap is not demonstrated — EPA/FDA guidance indicates triclosan in dish soaps provides no safety benefit beyond the surfactant cleaning action. Triclosan in dishwashing products is an unnecessary chemical exposure with an endocrine disruption and antibiotic resistance concern.","action":"Read the 'Drug Facts' box on antibacterial dish soaps to identify the active ingredient. If triclosan is listed, switch to a non-antibacterial dish soap — the cleaning performance is equivalent and the antimicrobial claim is unsupported."}],"green_flags":[{"indicator":"EPA Safer Choice certified, fragrance-free, with published 1,4-dioxane testing below 1 ppm","meaning":"EPA Safer Choice certification plus fragrance-free plus published 1,4-dioxane data below 1 ppm addresses all three primary concerns in this product category. These three signals together identify the genuinely lower-concern dish soap products currently available.","verification":"EPA Safer Choice registry at epa.gov/saferchoice. EWG Healthy Cleaning database for 1,4-dioxane test results by brand. Brands with documented compliance: Seventh Generation Free & Clear (Safer Choice certified, published 1,4-dioxane data), ECOS Dish Soap, Better Life Dish Soap."}],"what_to_ask":[{"question":"Does this dish soap have published 1,4-dioxane test results, and are they below 1 ppm? Is it EPA Safer Choice certified? What are the surfactants and fragrance components?","why_it_matters":"1,4-Dioxane is the primary carcinogen concern — not listed on labels, only detectable through testing. Safer Choice certification addresses surfactant safety and biodegradability. Fragrance disclosure identifies endocrine disruptor and allergen concerns.","good_answer":"EPA Safer Choice certified; 1,4-dioxane below 1 ppm per published testing; fragrance-free or natural fragrance with disclosed components.","bad_answer":"No 1,4-dioxane testing available; antibacterial with undisclosed active ingredient; high fragrance load without ingredient disclosure."}],"alternatives":[{"name":"Plant-based dish soap","notes":"Biodegradable formula with fewer synthetic chemicals"},{"name":"Castile soap solution","notes":"Gentler, plant-derived alternative for sensitive skin"}],"notes":null},"regulatory":{"applicable_regulations":[{"jurisdiction":"US","regulation":"New York State — 1,4-dioxane limits for cleaning products (1 ppm, effective 2023)","citation":null,"requirements":"New York enacted the first US 1,4-dioxane concentration limit for cleaning products in 2020 (effective December 2023): 1 ppm for household cleaning products and personal care products. This is not a federal standard — it is New York State law. However, because manufacturers typically formulate nationally rather than state-specifically, the NY limit has driven national reformulation. California and other states have similar regulations in development.","compliance_status":null,"effective_date":null,"enforcing_agency":null,"penalties":null,"source_ref":"src_001"}],"certifications":[{"name":"EPA Safer Choice","issuer":"EPA","standard":"EPA Safer Choice Standard","scope":"All ingredients meet Safer Choice criteria for human and environmental health"},{"name":"EU Ecolabel","issuer":"European Commission","standard":"EU Ecolabel for cleaning products","scope":"Environmental and health criteria for cleaning product ingredients"}],"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":"Empty containers are recyclable; concentrated chemicals may require hazardous waste disposal; never mix products","hazardous_waste":null,"expected_lifespan":"months"},"formulation":{"form":"liquid","key_ingredients":[{"hq_id":"hq-c-org-000735","name":"Sodium Laureth Sulfate (SLES)","role":"surfactant","concentration_pct":"15-20"},{"hq_id":"hq-c-org-000730","name":"Cocamidopropyl Betaine (CAPB)","role":"surfactant","concentration_pct":"2-5"},{"hq_id":"hq-c-ino-000083","name":"Sodium Chloride","role":"carrier","concentration_pct":"1-2"},{"hq_id":"hq-c-mix-000047","name":"Fragrance","role":"fragrance","concentration_pct":"0.5-1"},{"hq_id":"hq-c-org-000728","name":"Phenoxyethanol","role":"preservative","concentration_pct":"<0.5"},{"hq_id":null,"name":"Water","role":"solvent","concentration_pct":"70-80"}],"certifications":[]},"materials":{"common":[{"material_id":null,"material_name":"Sodium laureth sulfate (SLES) / sodium lauryl sulfate (SLS) — primary surfactants","component":"primary cleaning surfactant","prevalence":"very_common","notes":"SLES (sodium laureth sulfate; CAS 68585-34-2) and SLS (sodium lauryl sulfate; CAS 151-21-3) are the dominant anionic surfactants in conventional liquid dish soaps — providing the grease-cutting and foaming performance consumers associate with effective dish cleaning. SLES is produced by ethoxylating SLS with ethylene oxide. The ethoxylation reaction generates 1,4-dioxane as a byproduct — SLES and similar ethoxylated surfactants in personal care and cleaning products are the primary source of 1,4-dioxane in these products. The concentration of 1,4-dioxane contamination depends on the purification steps applied during manufacturing — most conventional formulas have historically not performed vacuum stripping to remove 1,4-dioxane from the SLES starting material."},{"material_id":null,"material_name":"Synthetic fragrance system","component":"odor profile","prevalence":"very_common","notes":"Dish soaps are heavily fragranced — lemon, orange, lavender, and other scents are core to the product identity. 'Fragrance' on dish soap labels conceals dozens to hundreds of individual chemical compounds. These include phthalates (used as fragrance fixatives — DEHP, DBP), musks (synthetic musks including galaxolide and tonalide, which bioaccumulate), and fragrance allergens regulated in EU cosmetics but not in US cleaning products. Skin contact during hand washing dishes is prolonged (5–15 minutes per dishwashing session, multiple times daily) — dermal absorption of fragrance compounds during dish soap use is non-trivial. Tracked as hq-c-org-000093."},{"material_id":null,"material_name":"Triclosan (legacy — largely phased out in dish soaps)","component":"antimicrobial additive in 'antibacterial' dish soaps","prevalence":"uncommon","notes":"Triclosan (hq-c-org-000089) was historically used in 'antibacterial' dish soaps (e.g., Dawn Ultra Antibacterial) as a contact biocide. Following FDA's 2016 ban on triclosan in rinse-off consumer soaps, most major brands reformulated dish soaps to remove triclosan. However, some product lines and import products may still contain triclosan. The FDA ban applies to consumer antiseptic wash products, which includes hand soap — the regulatory status for triclosan in dish soaps specifically required separate FDA guidance. Products marketed as 'antibacterial' dish soaps warrant verification of the active ingredient."}],"concerning":[{"material_id":null,"material_name":"1,4-Dioxane — manufacturing contaminant in ethoxylated surfactants","concern":"1,4-Dioxane (CAS 123-91-1; a cyclic ether) is generated as a byproduct during the ethoxylation of surfactants — it is not intentionally added and is not listed on product labels. IARC classifies 1,4-dioxane as a probable human carcinogen (Group 2A); the National Toxicology Program (NTP) classifies it as 'reasonably anticipated to be a human carcinogen.' Consumer Reports and EWG testing has consistently found 1,4-dioxane in major dish soap brands at concentrations ranging from below 1 ppm to above 20 ppm. New York State's 1 ppm limit (effective 2023 for cleaning products) has forced major brand reformulation — industry can remove 1,4-dioxane through vacuum stripping of the SLES ingredient but historically chose not to because it adds manufacturing cost.","compounds_of_concern":["hq-c-org-000217"],"source_refs":["src_001"]},{"material_id":null,"material_name":"Fragrance endocrine disruptors — prolonged dermal exposure during dishwashing","concern":"Dishwashing involves extended bare hand immersion in warm soapy water — 5–15 minutes per session, multiple sessions per day. Water-enhanced skin penetration and warm water vasodilation both increase dermal absorption during dishwashing. Fragrance compounds in dish soap — phthalate fixatives, synthetic musks, and contact allergens — are dermally absorbed during this extended warm-water skin contact. EWG's Skin Deep database and ECHA database for EU cosmetics identify multiple fragrance allergens and endocrine disruptors commonly present in dish soap fragrance systems. The prolonged skin contact during dishwashing makes dish soap fragrance a meaningfully higher-exposure route than rinse-off shampoo or body wash.","compounds_of_concern":["hq-c-org-000093"],"source_refs":["src_002"]}],"preferred":[{"material_id":null,"material_name":"EPA Safer Choice certified fragrance-free dish soap with verified 1,4-dioxane below 1 ppm","why_preferred":"EPA Safer Choice certified dish soaps must use surfactants from the Safer Choice surfactant list — which requires demonstrated safety for human health and environmental biodegradability. Safer Choice restricts SLES with high ethylene oxide contamination. Fragrance-free eliminates the fragrance allergen and endocrine disruptor concern. Some Safer Choice certified brands publish 1,4-dioxane test results below 1 ppm (Seventh Generation, ECOS, Better Life). This combination addresses both the 1,4-dioxane and fragrance concerns.","tradeoffs":"Safer Choice certified dish soaps are typically more expensive ($5–10 vs $2–4 for conventional brands). Some consumers find fragrance-free dish soaps less satisfying to use due to absence of the scent signals associated with cleaning. Some plant-based surfactants in Safer Choice products may have slightly lower grease-cutting performance than SLS/SLES in difficult applications. NY state 1 ppm limit is driving conventional brand reformulation — major brands are reformulating toward compliance, expanding available lower-concern options."}]},"compound_composition":[{"hq_id":"hq-c-org-000217","compound_name":"Nonylphenol (NP) and nonylphenol ethoxylates (NPEs)","role":"compound_of_concern","typical_concentration":null},{"hq_id":"hq-c-org-000093","compound_name":"D-Limonene","role":"compound_of_concern","typical_concentration":null}],"identifiers":{"common_names":["conventional liquid dish soap"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Dove Beauty Bar","manufacturer":"Unilever","market_position":"mass_market","notable":"Mass-market moisturizing soap; widely distributed"},{"brand":"Ivory","manufacturer":"Procter & Gamble","market_position":"mass_market","notable":"Classic mass-market bar soap"},{"brand":"Dial","manufacturer":"Henkel","market_position":"mass_market","notable":"Antibacterial mass-market soap"},{"brand":"Lux","manufacturer":"Unilever","market_position":"premium","notable":"Premium bath bar with essential oils"},{"brand":"Clearly Natural","manufacturer":"Clearly Natural","market_position":"premium","notable":"Natural premium soap 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":[{"id":"src_001","type":"regulatory","title":"New York State 1,4-dioxane regulation for household cleaning products — DEC 6 NYCRR Part 659","url":"https://www.dec.ny.gov/chemical/109070.html","accessed":"2026-03-08","year":2020,"notes":"New York State 1,4-dioxane standard for cleaning products; 1 ppm limit effective December 2023; technical basis; comparison with EWG testing data for major brands; regulatory rationale based on NTP and IARC classification of 1,4-dioxane as probable human carcinogen"},{"id":"src_002","type":"journal","title":"Dermal absorption of fragrance components during handwashing — contribution to systemic exposure","url":"https://doi.org/10.1021/acs.est.7b04006","accessed":"2026-03-08","year":2018,"notes":"Measurement of fragrance compound dermal absorption during handwashing scenarios; warm water enhancement of penetration; specific compound absorption rates for common fragrance ingredients; comparison with rinse-off body wash; basis for dish soap prolonged skin contact fragrance concern"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:28:11.029Z"}}