{"hq_id":"hq-c-org-000230","name":"Trichloroacetic acid (TCA)","context":"human_adult","timestamp":"2026-10-27T20:58:02.718Z","derived_by":{"label":"ALETHEIA-derived","engine":{"commit":"a1c6e861599cc34c5db0318ea1a7ac13a327e074","commit_source":"vercel_env","tree_clean":null},"params":{"sha256":"88ae43137e58ed0cd65588409efefee0d90253da01ef4459bf9ee25f888ec9a0","files":["axes.json","context-specificity.json","regulatory-mappings.json","synthesis-params.json","thresholds.json"]},"clock":{"year":2026},"inputs":[{"id":"hq-c-org-000230","sha256":"3c46bcd7ec4f2ec2e2894494e8bbc3b6fc4db13c230bf6a426a6c61af0672a92"}]},"risk_level":"moderate_to_high","risk_profile":{"magnitude":{"mean":0.515055,"weightedMean":0.515055,"std_dev":0.173086,"confidence_interval_95":[0.3,0.8],"source_positions":[{"source":"EPA CTX / CalEPA","year":2021,"value":0.8,"weight":0.30176},{"source":"IARC","year":2014,"value":0.5,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":0.5,"weight":0.30176},{"source":"HQ_DIRECT","year":2026,"value":0.3,"weight":0.35}]},"confidence":{"mean":0.73786,"weightedMean":0.73786,"std_dev":0.139778,"confidence_interval_95":[0.5,0.82],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.5,"weight":0.35},{"source":"IARC","year":2014,"value":0.82,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":0.82,"weight":0.30176},{"source":"EPA CTX / CalEPA","year":2021,"value":0.82,"weight":0.30176}]},"recency":{"mean":0.569919,"weightedMean":0.569919,"std_dev":0.258835,"confidence_interval_95":[0.368,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":1,"weight":0.35},{"source":"IARC","year":2014,"value":0.5,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":0.368,"weight":0.30176},{"source":"EPA CTX / CalEPA","year":2021,"value":0.368,"weight":0.30176}]},"methodology":{"mean":0.922993,"weightedMean":0.922993,"std_dev":0.131042,"confidence_interval_95":[0.7,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.7,"weight":0.35},{"source":"IARC","year":2014,"value":1,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":1,"weight":0.30176},{"source":"EPA CTX / CalEPA","year":2021,"value":1,"weight":0.30176}]},"specificity":{"mean":0.793637,"weightedMean":0.793637,"std_dev":0.074257,"confidence_interval_95":[0.75,0.92],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.92,"weight":0.35},{"source":"IARC","year":2014,"value":0.75,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":0.75,"weight":0.30176},{"source":"EPA CTX / CalEPA","year":2021,"value":0.75,"weight":0.30176}]},"consensus":{"exists":false,"strength":0,"disagreement_magnitude":0.319781,"warning":null}},"interpretation":{"summary":"Regulatory agencies show substantial disagreement. EPA CTX / CalEPA classifies as higher risk (80th percentile), while HQ_DIRECT concludes lower risk (30th percentile).","confidence_note":"Moderate-quality evidence base. Disagreement reflects methodological and interpretive differences, not data quality issues.","context_note":null,"warning":null},"sources":[{"id":"iarc_haa_v84_2004","type":"regulatory","title":"IARC Monographs Volume 84: Some Drinking-water Disinfectants and Contaminants, Including Arsenic — Dichloroacetic Acid Group 2B, Trichloroacetic Acid Group 2B, MX Group 2B (2004)","year":2004},{"id":"epa_stage2_dbpr_2006","type":"regulatory","title":"US EPA: Stage 2 Disinfectants and Disinfection Byproducts Rule (40 CFR Parts 141 and 142) — TTHM MCL 80 μg/L, HAA5 MCL 60 μg/L, Locational Running Annual Average, BDCM Cancer Risk Assessment, Bladder Cancer Epidemiology (2006)","year":2006},{"id":"r60-2026-09-30-d918-oehha-prop65-list-csv-own-url","type":"regulatory","title":"PROPOSITION 65 LIST OF CARCINOGENS OR REPRODUCTIVE TOXICANTS","year":2026,"url":"https://oehha.ca.gov/sites/default/files/media/2025-01/p65chemicalslist.csv"},{"id":"r60-2026-09-26-d867-cc1-iarc-list-of-classifications-loc-app","type":"regulatory","title":"IARC Monographs, List of Classifications","year":2026,"url":"https://monographs.iarc.who.int/list-of-classifications"},{"id":"r60-2026-09-29-d899-s4-b06-iris-landing-655-trichloroacetic-acid","type":"regulatory","title":"Trichloroacetic acid | CASRN 76-03-9 | DTXSID1021378 | IRIS | US EPA, ORD","url":"https://iris.epa.gov/ChemicalLanding/&substance_nmbr=655"},{"id":"r60-2026-10-01-echa-annex-vi-clp-table-atp23-xlsx","type":"regulatory","title":"ECHA Annex VI to CLP: the unofficial Excel table (up to and including the 23rd ATP) (secondary: unofficial by its own statement)","url":"https://echa.europa.eu/documents/10162/17218/annex_vi_clp_table_atp23_en.xlsx/b3816c13-81a3-816d-773a-62e88c4e2700?t=1761727004499"},{"id":"echa-chem-reach-registrations","type":"regulatory","title":"ECHA CHEM, Download all substances: REACH registrations (ECHA's own list of REACH-registered substances)","year":2026,"url":"https://chem.echa.europa.eu/"},{"id":"src_pubchem_tox_6421","type":"pubchem","title":"PubChem: Toxicity section (CID 6421)","url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/6421/JSON?heading=Toxicity"},{"id":"r60-2026-10-03-d923-niosh-npgd0626","type":"regulatory","title":"NIOSH Pocket Guide to Chemical Hazards - Trichloroacetic acid","url":"https://www.cdc.gov/niosh/npg/npgd0626.html"},{"id":"pubchem-exp-cameo-chemicals-cid-6421","type":"database","title":"CAMEO Chemicals, as recorded by PubChem (Experimental Properties, CID 6421; where-to-look, not a source of this value)","year":2026,"url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/6421/JSON?heading=Experimental+Properties"},{"id":"pubchem-exp-hazardous-substances-data-bank-cid-6421","type":"database","title":"Hazardous Substances Data Bank (HSDB), as recorded by PubChem (Experimental Properties, CID 6421; where-to-look, not a source of this value)","year":2026,"url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/6421/JSON?heading=Experimental+Properties"},{"id":"ctx_pred_dtxsid1021378","type":"reference","title":"EPA CompTox CTX API: predicted properties for DTXSID1021378 (Trichloroacetic acid (TCA))","url":"https://comptox.epa.gov/ctx-api/chemical/property/predicted/search/by-dtxsid/DTXSID1021378"}],"sources_scope":"context","derived_markers":[],"warnings":["year_inferred:EPA CTX / IRIS:2021","year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: positiv","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: positiv","unmapped_classification:ECHA (CLP Annex VI):skin irritation: skin corr. 1a","unmapped_classification:Japan, as recorded by ToxValDB:eye irritation: category 1 (score: very high)","unmapped_classification:Japan, as recorded by ToxValDB:skin irritation: category 1 (score: very high)","unmapped_classification:New Zealand, as recorded by ToxValDB:eye irritation: category 8.3a (category 1) (score:","unmapped_classification:New Zealand, as recorded by ToxValDB:skin irritation: category 8.2a (category 1a) (scor","unmapped_classification:ECHA eChemPortal, as recorded by ToxValDB:skin sensitisation: in vivo (non-llna): high frequ","unmapped_classification:ECHA eChemPortal, as recorded by ToxValDB:skin sensitisation: in vivo (non-llna): not likely"],"meta":{"synthesis_version":"1.1.0","config_version":"1.1.0","n_sources":4,"db_version":54,"warnings":["year_inferred:EPA CTX / IRIS:2021","year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: positiv","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: positiv","unmapped_classification:ECHA (CLP Annex VI):skin irritation: skin corr. 1a","unmapped_classification:Japan, as recorded by ToxValDB:eye irritation: category 1 (score: very high)","unmapped_classification:Japan, as recorded by ToxValDB:skin irritation: category 1 (score: very high)","unmapped_classification:New Zealand, as recorded by ToxValDB:eye irritation: category 8.3a (category 1) (score:","unmapped_classification:New Zealand, as recorded by ToxValDB:skin irritation: category 8.2a (category 1a) (scor","unmapped_classification:ECHA eChemPortal, as recorded by ToxValDB:skin sensitisation: in vivo (non-llna): high frequ","unmapped_classification:ECHA eChemPortal, as recorded by ToxValDB:skin sensitisation: in vivo (non-llna): not likely"]},"schema":"synthesis","_notice":"ALETHEIA output is reference data, not professional advice. Not a substitute for primary agency sources or qualified professionals. See https://aletheia.holisticquality.io/disclaimer.","_disclaimer_url":"https://aletheia.holisticquality.io/disclaimer","available_contexts":["human_adult","human_child","exposure_ingestion","human_teen","human_elderly","human_infant","human_pregnant"]}