{"hq_id":"hq-c-org-000014","name":"DDT (dichlorodiphenyltrichloroethane)","context":"human_adult","timestamp":"2026-10-27T21:16:24.064Z","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-000014","sha256":"709ea221960a0614f39485ba6da82b2a1e2ac14bec817fe88dc0c285e6d94bac"}]},"risk_level":"high","risk_profile":{"magnitude":{"mean":0.650995,"weightedMean":0.650995,"std_dev":0.156456,"confidence_interval_95":[0.35,0.8],"source_positions":[{"source":"EPA CTX / CalEPA","year":2021,"value":0.8,"weight":0.30176},{"source":"US EPA","year":1987,"value":0.75,"weight":0.41},{"source":"IARC","year":2015,"value":0.7,"weight":0.41},{"source":"EPA CTX / NTP RoC","year":2021,"value":0.65,"weight":0.30176},{"source":"HQ_DIRECT","year":2026,"value":0.35,"weight":0.35}]},"confidence":{"mean":0.756849,"weightedMean":0.756849,"std_dev":0.127359,"confidence_interval_95":[0.5,0.82],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.5,"weight":0.35},{"source":"IARC","year":2015,"value":0.82,"weight":0.41},{"source":"US EPA","year":1987,"value":0.82,"weight":0.41},{"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":0.553755,"weightedMean":0.553755,"std_dev":0.228859,"confidence_interval_95":[0.368,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":1,"weight":0.35},{"source":"IARC","year":2015,"value":0.5,"weight":0.41},{"source":"US EPA","year":1987,"value":0.5,"weight":0.41},{"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":0.940796,"weightedMean":0.940796,"std_dev":0.119399,"confidence_interval_95":[0.7,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.7,"weight":0.35},{"source":"IARC","year":2015,"value":1,"weight":0.41},{"source":"US EPA","year":1987,"value":1,"weight":0.41},{"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":0.783549,"weightedMean":0.783549,"std_dev":0.067659,"confidence_interval_95":[0.75,0.92],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.92,"weight":0.35},{"source":"IARC","year":2015,"value":0.75,"weight":0.41},{"source":"US EPA","year":1987,"value":0.75,"weight":0.41},{"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":0.344616,"warning":null},"outliers":[{"source":"HQ_DIRECT","value":0.35}]},"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_113","type":"regulatory","title":"IARC Monographs Volume 113: DDT, Lindane, and 2,4-D","year":2015,"url":"http://publications.iarc.fr/550"},{"id":"epa_ddt","type":"regulatory","title":"US EPA: DDT — A Brief History and Status","year":1987,"url":"https://www.epa.gov/ingredients-used-pesticide-products/ddt-brief-history-and-status"},{"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":"r60-2026-09-30-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-147","type":"regulatory","title":"p,p'-Dichlorodiphenyltrichloroethane (DDT) | CASRN 50-29-3 | DTXSID4020375 | IRIS | US EPA, ORD","url":"https://iris.epa.gov/ChemicalLanding/&substance_nmbr=147"},{"id":"src_pubchem_tox_3036","type":"pubchem","title":"PubChem: Toxicity section (CID 3036)","url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/3036/JSON?heading=Toxicity"},{"id":"r60-2026-10-03-d923-niosh-npgd0174","type":"regulatory","title":"NIOSH Pocket Guide to Chemical Hazards - DDT","url":"https://www.cdc.gov/niosh/npg/npgd0174.html"},{"id":"r60-2026-10-01-dd54-pops-all-pops","type":"regulatory","title":"Stockholm Convention: All POPs (the Convention's own list of listed chemicals, Annexes A, B and C)","url":"https://www.pops.int/TheConvention/ThePOPs/AllPOPs/tabid/2509/Default.aspx"},{"id":"doc-2026-10-03-d975-www-atsdr-cdc-gov-toxprofiles-tp35-pdf","type":"assessment","title":"Toxicological Profile for DDT, DDE, and DDD (ATSDR, April 2022)","url":"https://www.atsdr.cdc.gov/ToxProfiles/tp35.pdf"},{"id":"r60-2026-10-08-d974-tedx-list-full-export","type":"reference_database","title":"TEDX List of Potential Endocrine Disruptors, full export (Excel from the publisher's own search, operator-saved 2026-10-08; list last updated September 2018)","url":"https://endocrinedisruption.org/interactive-tools/tedx-list-of-potential-endocrine-disruptors/search-the-tedx-list"},{"id":"ctx_pred_dtxsid4020375","type":"reference","title":"EPA CompTox CTX API: predicted properties for DTXSID4020375 (DDT (dichlorodiphenyltrichloroethane))","url":"https://comptox.epa.gov/ctx-api/chemical/property/predicted/search/by-dtxsid/DTXSID4020375"},{"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)","url":"https://echa.europa.eu/documents/10162/17218/annex_vi_clp_table_atp23_en.xlsx/b3816c13-81a3-816d-773a-62e88c4e2700?t=1761727004499"}],"sources_scope":"context","derived_markers":[],"warnings":["year_inferred:EPA CTX / NTP RoC:2021","year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: negativ","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: negativ","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)"],"meta":{"synthesis_version":"1.1.0","config_version":"1.1.0","n_sources":5,"db_version":49,"warnings":["year_inferred:EPA CTX / NTP RoC:2021","year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: negativ","unmapped_classification:US EPA (CompTox genotoxicity summary):epa comptox computed genotoxicity summary: negativ","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)"]},"synthesized_at":"2026-10-27T21:11:14.442Z","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","human_pregnant","aquatic_life","dog","cat","human_teen","human_elderly","human_infant","exposure_dermal","exposure_inhalation","exposure_ingestion","exposure_ocular","occupational_exposure"]}