{"hq_id":"hq-c-org-000239","name":"1,2-Dichloropropane (1,2-DCP)","context":"human_adult","timestamp":"2026-10-27T17:01:45.010Z","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-000239","sha256":"b883ed115d7f1ef5a5b3988afad4eebe68d40ffd4f0e01edab1015dba57f1931"}]},"risk_level":"severe","risk_profile":{"magnitude":{"mean":0.709584,"weightedMean":0.709584,"std_dev":0.259356,"confidence_interval_95":[0.35,0.95],"source_positions":[{"source":"IARC","year":2017,"value":0.95,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":0.8,"weight":0.30176},{"source":"HQ_DIRECT","year":2026,"value":0.35,"weight":0.35}]},"confidence":{"mean":0.714515,"weightedMean":0.714515,"std_dev":0.150427,"confidence_interval_95":[0.5,0.82],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.5,"weight":0.35},{"source":"IARC","year":2017,"value":0.82,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":0.82,"weight":0.30176}]},"recency":{"mean":0.627305,"weightedMean":0.627305,"std_dev":0.26675,"confidence_interval_95":[0.368,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":1,"weight":0.35},{"source":"IARC","year":2017,"value":0.5,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":0.368,"weight":0.30176}]},"methodology":{"mean":0.901108,"weightedMean":0.901108,"std_dev":0.141025,"confidence_interval_95":[0.7,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.7,"weight":0.35},{"source":"IARC","year":2017,"value":1,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":1,"weight":0.30176}]},"specificity":{"mean":0.806039,"weightedMean":0.806039,"std_dev":0.079914,"confidence_interval_95":[0.75,0.92],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.92,"weight":0.35},{"source":"IARC","year":2017,"value":0.75,"weight":0.41},{"source":"EPA CTX / CalEPA","year":2021,"value":0.75,"weight":0.30176}]},"consensus":{"exists":false,"strength":0,"disagreement_magnitude":0.40775,"warning":null}},"interpretation":{"summary":"Regulatory agencies show substantial disagreement. IARC classifies as higher risk (95th 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_12dcp_v110_2017","type":"regulatory","title":"IARC Monographs Volume 110: Some Chemicals Used as Solvents and in Polymer Manufacture — 1,2-Dichloropropane Group 1 (Biliary Tract Cancer, Japanese Printing Workers Epidemic), Methylene Chloride Group 2A (2017)","year":2017,"url":"https://www.ncbi.nlm.nih.gov/books/NBK436277/"},{"id":"epa_sdwa_mclg_vocs","type":"regulatory","title":"US EPA National Primary Drinking Water Regulations (40 CFR 141.61) — 1,2-Dichloropropane MCL 0.005 mg/L (MCLG 0)","year":1989,"url":"https://www.ecfr.gov/current/title-40/chapter-I/subchapter-D/part-141/subpart-G"},{"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":"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_6564","type":"pubchem","title":"PubChem: Toxicity section (CID 6564)","url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/6564/JSON?heading=Toxicity"},{"id":"r60-2026-10-03-d923-niosh-npgd0534","type":"regulatory","title":"NIOSH Pocket Guide to Chemical Hazards - Propylene dichloride","url":"https://www.cdc.gov/niosh/npg/npgd0534.html"},{"id":"pubchem-exp-cameo-chemicals-cid-6564","type":"database","title":"CAMEO Chemicals, as recorded by PubChem (Experimental Properties, CID 6564; where-to-look, not a source of this value)","year":2026,"url":"https://pubchem.ncbi.nlm.nih.gov/rest/pug_view/data/compound/6564/JSON?heading=Experimental+Properties"},{"id":"ctx_pred_dtxsid0020448","type":"reference","title":"EPA CompTox CTX API: predicted properties for DTXSID0020448 (1,2-Dichloropropane (1,2-DCP))","url":"https://comptox.epa.gov/ctx-api/chemical/property/predicted/search/by-dtxsid/DTXSID0020448"},{"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 / CalEPA:2021","unmapped_classification:EPA CTX / NIOSH:potential occupational carcinogen","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:Japan, as recorded by ToxValDB:eye irritation: category 2a (score: high)","unmapped_classification:Japan, as recorded by ToxValDB:skin irritation: category 2 (score: high)","unmapped_classification:Japan, as recorded by ToxValDB:skin sensitization: category 1 (score: high)","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 6.3b (category 3) (score","unmapped_classification:ECHA eChemPortal, as recorded by ToxValDB:skin irritation: in vivo: moderate or mild irritat","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":3,"db_version":50,"warnings":["year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:EPA CTX / NIOSH:potential occupational carcinogen","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:Japan, as recorded by ToxValDB:eye irritation: category 2a (score: high)","unmapped_classification:Japan, as recorded by ToxValDB:skin irritation: category 2 (score: high)","unmapped_classification:Japan, as recorded by ToxValDB:skin sensitization: category 1 (score: high)","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 6.3b (category 3) (score","unmapped_classification:ECHA eChemPortal, as recorded by ToxValDB:skin irritation: in vivo: moderate or mild irritat","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"]}