{"hq_id":"hq-c-org-000236","name":"1,2-Dichloroethane (1,2-DCA / EDC)","context":"human_adult","timestamp":"2026-10-27T17:01:34.173Z","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-000236","sha256":"9b917ddef98be7a812b6e478e81447ae1dc12581edd5237a8927855399650d61"}]},"risk_level":"high","risk_profile":{"magnitude":{"mean":0.595319,"weightedMean":0.595319,"std_dev":0.165392,"confidence_interval_95":[0.35,0.8],"source_positions":[{"source":"EPA CTX / CalEPA","year":2021,"value":0.8,"weight":0.30176},{"source":"EPA CTX / IRIS","year":2021,"value":0.75,"weight":0.30176},{"source":"EPA CTX / NTP RoC","year":2021,"value":0.65,"weight":0.30176},{"source":"IARC","year":1999,"value":0.5,"weight":0.41},{"source":"HQ_DIRECT","year":2026,"value":0.35,"weight":0.35}]},"confidence":{"mean":0.752744,"weightedMean":0.752744,"std_dev":0.130378,"confidence_interval_95":[0.5,0.82],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.5,"weight":0.35},{"source":"IARC","year":1999,"value":0.82,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":0.82,"weight":0.30176},{"source":"EPA CTX / NTP RoC","year":2021,"value":0.82,"weight":0.30176},{"source":"EPA CTX / CalEPA","year":2021,"value":0.82,"weight":0.30176}]},"recency":{"mean":0.53333,"weightedMean":0.53333,"std_dev":0.246789,"confidence_interval_95":[0.368,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":1,"weight":0.35},{"source":"IARC","year":1999,"value":0.5,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":0.368,"weight":0.30176},{"source":"EPA CTX / NTP RoC","year":2021,"value":0.368,"weight":0.30176},{"source":"EPA CTX / CalEPA","year":2021,"value":0.368,"weight":0.30176}]},"methodology":{"mean":0.936948,"weightedMean":0.936948,"std_dev":0.12223,"confidence_interval_95":[0.7,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.7,"weight":0.35},{"source":"IARC","year":1999,"value":1,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":1,"weight":0.30176},{"source":"EPA CTX / NTP RoC","year":2021,"value":1,"weight":0.30176},{"source":"EPA CTX / CalEPA","year":2021,"value":1,"weight":0.30176}]},"specificity":{"mean":0.78573,"weightedMean":0.78573,"std_dev":0.069264,"confidence_interval_95":[0.75,0.92],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.92,"weight":0.35},{"source":"IARC","year":1999,"value":0.75,"weight":0.41},{"source":"EPA CTX / IRIS","year":2021,"value":0.75,"weight":0.30176},{"source":"EPA CTX / NTP RoC","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":0.314261,"warning":null}},"interpretation":{"summary":"Regulatory agencies show substantial disagreement. EPA CTX / CalEPA classifies as higher risk (80th percentile), while HQ_DIRECT concludes lower risk (35th 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_ccl4_v71_1999","type":"regulatory","title":"IARC Monographs Volume 71: Re-evaluation of Some Organic Chemicals, Hydrazine and Hydrogen Peroxide — Carbon Tetrachloride Group 2B, Chloroform Group 2B, 1,2-Dichloroethane Group 2B (1999)","year":1999,"url":"http://publications.iarc.fr/89"},{"id":"epa_sdwa_mclg_vocs","type":"regulatory","title":"US EPA: National Primary Drinking Water Regulations — Volatile Organic Chemicals (40 CFR 141.61); TCE MCL 5 μg/L, PCE MCL 5 μg/L, CCl4 MCL 5 μg/L, Chloroform MCL via TTHM, 1,2-DCE MCL 5 μg/L, 1,1,1-TCA MCL 200 μg/L","year":1989,"url":"https://www.ecfr.gov/api/versioner/v1/full/2026-09-24/title-40.xml?part=141&section=141.61"},{"id":"r60-2026-09-24-d867-ecfr-29cfr1910.1000","type":"regulatory","title":"§ 1910.1000 Air contaminants.","url":"https://www.ecfr.gov/api/versioner/v1/full/2026-09-22/title-29.xml?part=1910&section=1910.1000"},{"id":"r60-2026-09-23-eu-reach-consolidated-02006R1907-20260622","type":"regulatory","title":"Consolidated TEXT: 32006R1907 — EN — 22.06.2026","url":"https://publications.europa.eu/resource/celex/02006R1907-20260622"},{"id":"r60-2026-09-26-d867-cc4-epa-dwsha-tables-2018","type":"regulatory","title":"2018 Edition of the Drinking Water Standards and Health Advisories Tables (EPA 822-F-18-001)","url":"https://www.epa.gov/system/files/documents/2022-01/dwtable2018.pdf"},{"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-ntp-roc-15th-listed-substances","type":"regulatory","title":"Substances Listed in the Fifteenth Report on Carcinogens","url":"https://ntp.niehs.nih.gov/sites/default/files/ntp/roc/content/listed_substances_508.pdf"},{"id":"r60-2026-09-25-d449-iris-149","type":"regulatory","title":"1,2-Dichloroethane | CASRN 107-06-2 | DTXSID6020438 | IRIS | US EPA, ORD","url":"https://iris.epa.gov/ChemicalLanding/&substance_nmbr=149"},{"id":"r60-2026-10-01-dd54-hc-trvs-v2-h128-1-11-638","type":"regulatory","title":"Federal Contaminated Site Risk Assessment in Canada, Part II: Health Canada Toxicological Reference Values (TRVs) and Chemical-Specific Factors, Version 2.0","url":"http://publications.gc.ca/collections/collection_2012/sc-hc/H128-1-11-638-eng.pdf"},{"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":"r60-2026-10-02-d-955-s31-r1-d955-s31-npg-npgd0271","type":"regulatory","title":"NIOSH Pocket Guide - Ethylene dichloride","url":"https://www.cdc.gov/niosh/npg/npgd0271.html"},{"id":"r60-2026-09-30-d907-f1d6179110","type":"regulatory","title":"Industry Code of Practice on Chemicals Classification and Hazard Communication (DOSH Malaysia)","url":"https://dosh.gov.my/wp-content/uploads/2026/06/ICOP-Chemical-Classification-and-Hazard-Communication-2014.pdf"},{"id":"src_pubchem_tox_11","type":"pubchem","title":"PubChem: Toxicity section (CID 11)","url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/11/JSON?heading=Toxicity"},{"id":"r60-2026-09-25-d897-eu-cellar-02004L0037-20240408","type":"regulatory","title":"Consolidated TEXT: 32004L0037 — EN — 08.04.2024","url":"https://publications.europa.eu/resource/celex/02004L0037-20240408"},{"id":"pubchem-exp-hazardous-substances-data-bank-cid-11","type":"database","title":"Hazardous Substances Data Bank (HSDB), as recorded by PubChem (Experimental Properties, CID 11; where-to-look, not a source of this value)","year":2026,"url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/11/JSON?heading=Experimental+Properties"},{"id":"ctx_pred_dtxsid6020438","type":"reference","title":"EPA CompTox CTX API: predicted properties for DTXSID6020438 (1,2-Dichloroethane (1,2-DCA / EDC))","url":"https://comptox.epa.gov/ctx-api/chemical/property/predicted/search/by-dtxsid/DTXSID6020438"}],"sources_scope":"context","derived_markers":[],"warnings":["year_inferred:EPA CTX / IRIS:2021","year_inferred:EPA CTX / NTP RoC:2021","year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:EPA CTX / Health Canada:group ii: cepa (probably carcinogenic to humans)","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):eye irritation: eye irrit. 2","unmapped_classification:ECHA (CLP Annex VI):skin irritation: skin irrit. 2","unmapped_classification:Japan, as recorded by ToxValDB:eye irritation: category 2b (score: moderate)","unmapped_classification:Japan, as recorded by ToxValDB:skin irritation: not classified (score: low)","unmapped_classification:DOSH Malaysia (ICOP):eye irritation: eye irrit. 2","unmapped_classification:DOSH Malaysia (ICOP):skin irritation: skin irrit. 2","unmapped_classification:New Zealand, as recorded by ToxValDB:eye irritation: category 6.4a (category 2a) (score","unmapped_classification:New Zealand, as recorded by ToxValDB:skin irritation: category 6.3a (category 2) (score","unmapped_classification:New Zealand, as recorded by ToxValDB:skin sensitization: category 6.5b (category 1) (sc","unmapped_classification:ECHA eChemPortal, as recorded by ToxValDB:skin sensitisation: in vivo (llna): not likely to "],"meta":{"synthesis_version":"1.1.0","config_version":"1.1.0","n_sources":5,"db_version":50,"warnings":["year_inferred:EPA CTX / IRIS:2021","year_inferred:EPA CTX / NTP RoC:2021","year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:EPA CTX / Health Canada:group ii: cepa (probably carcinogenic to humans)","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):eye irritation: eye irrit. 2","unmapped_classification:ECHA (CLP Annex VI):skin irritation: skin irrit. 2","unmapped_classification:Japan, as recorded by ToxValDB:eye irritation: category 2b (score: moderate)","unmapped_classification:Japan, as recorded by ToxValDB:skin irritation: not classified (score: low)","unmapped_classification:DOSH Malaysia (ICOP):eye irritation: eye irrit. 2","unmapped_classification:DOSH Malaysia (ICOP):skin irritation: skin irrit. 2","unmapped_classification:New Zealand, as recorded by ToxValDB:eye irritation: category 6.4a (category 2a) (score","unmapped_classification:New Zealand, as recorded by ToxValDB:skin irritation: category 6.3a (category 2) (score","unmapped_classification:New Zealand, as recorded by ToxValDB:skin sensitization: category 6.5b (category 1) (sc","unmapped_classification:ECHA eChemPortal, as recorded by ToxValDB:skin sensitisation: in vivo (llna): not likely to "]},"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","exposure_dermal","exposure_inhalation","exposure_ocular","occupational_exposure"]}