{"hq_id":"hq-c-ino-000054","name":"Hydrazine","context":"human_adult","timestamp":"2026-08-28T03:01:55.094Z","risk_level":"severe","risk_profile":{"magnitude":{"mean":0.705265,"weightedMean":0.705265,"std_dev":0.06154,"confidence_interval_95":[0.65,0.8],"source_positions":[{"source":"EPA CTX / CalEPA","year":2021,"value":0.8,"weight":0.30176},{"source":"US EPA","year":1999,"value":0.75,"weight":0.41},{"source":"IARC","year":1999,"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":0.625,"weight":0.35}]},"confidence":{"mean":0.756849,"weightedMean":0.756849,"std_dev":0.127359,"confidence_interval_95":[0.82,0.82],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.5,"weight":0.35},{"source":"IARC","year":1999,"value":0.82,"weight":0.41},{"source":"US EPA","year":1999,"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":[0.5,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":1,"weight":0.35},{"source":"IARC","year":1999,"value":0.5,"weight":0.41},{"source":"US EPA","year":1999,"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":[1,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.7,"weight":0.35},{"source":"IARC","year":1999,"value":1,"weight":0.41},{"source":"US EPA","year":1999,"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":[0.92,0.92],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.92,"weight":0.35},{"source":"IARC","year":1999,"value":0.75,"weight":0.41},{"source":"US EPA","year":1999,"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":0.589733,"disagreement_magnitude":0.308845,"warning":null}},"interpretation":{"summary":"Regulatory agencies show substantial disagreement. EPA CTX / CalEPA classifies as higher risk (80th percentile), while HQ_DIRECT concludes lower risk (63th 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_hydrazine_vol71_1999","type":"iarc_monograph","title":"IARC Monographs Volume 71: Hydrazine — Group 2B (superseded; upgraded to Group 2A in Volume 115, 2018); Lung Tumors in Mice; Hepatic Tumors in Rats; Aerospace and Boiler Worker Exposure; Isoniazid Metabolic Connection","year":1999},{"id":"niosh_hydrazine_rel","type":"regulatory","title":"NIOSH: Hydrazine — REL 0.03 ppm Ceiling; Carcinogen Classification; Corrosivity; CNS Toxicity; Aerospace Propellant Hazards","year":1978},{"id":"atsdr_hydrazine_toxprofile","type":"regulatory","title":"ATSDR Toxicological Profile: Hydrazine, 1,1-Dimethylhydrazine, 1,2-Dimethylhydrazine — Carcinogenicity, Hepatotoxicity, Hemolytic Anemia, Aquatic Toxicity, Aerospace Exposure","year":1997},{"id":"iarc_hydrazine_vol115_2018","type":"iarc_monograph","title":"IARC Monographs Volume 115: Some Industrial Chemicals — Hydrazine Group 2A (probably carcinogenic to humans); limited evidence in humans (positive association with lung cancer), sufficient evidence in experimental animals; upgraded from Group 2B (Vol 71, 1999) (2018)","year":2018,"url":"https://www.ncbi.nlm.nih.gov/books/n/iarcmono115/a011.sec6/"}],"sources_scope":"record","warnings":["year_inferred:EPA CTX / NTP RoC:2021","year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:EPA CTX / NIOSH:potential occupational carcinogen","unmapped_classification:EPA CTX / Genetox:genotoxicity: positive (ames: positive, 12 positiv","unmapped_classification:EPA CTX / Genetox:genotoxicity: positive (ames: positive, 12 positiv","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: skin corr. 1b (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: skin sens. 1 (score: high)","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: sh (score: high)","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: skin corrosion/irritation - categ","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: skin sensitization - category ","unmapped_classification:EPA CTX / Skin-Eye:eye irritation: category 1 (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: category 1 (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: category 1 (score: high)","unmapped_classification:EPA CTX / Skin-Eye:eye irritation: eye dam. 1 (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: skin corr. 1b (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: skin sens. 1 (score: high)","unmapped_classification:EPA CTX / Skin-Eye:eye irritation: category 8.3a (category 1) (score:","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: category 8.2a (category 1a) (scor","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: category 6.5b (category 1) (sc","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: in vivo: studies indicate no sign","unmapped_classification:EPA CTX / Skin-Eye:eye irritation: in vivo: studies indicate no signi"],"meta":{"synthesis_version":"1.1.0","config_version":"1.1.0","n_sources":5,"db_version":45,"warnings":["year_inferred:EPA CTX / NTP RoC:2021","year_inferred:EPA CTX / CalEPA:2021","unmapped_classification:EPA CTX / NIOSH:potential occupational carcinogen","unmapped_classification:EPA CTX / Genetox:genotoxicity: positive (ames: positive, 12 positiv","unmapped_classification:EPA CTX / Genetox:genotoxicity: positive (ames: positive, 12 positiv","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: skin corr. 1b (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: skin sens. 1 (score: high)","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: sh (score: high)","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: skin corrosion/irritation - categ","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: skin sensitization - category ","unmapped_classification:EPA CTX / Skin-Eye:eye irritation: category 1 (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: category 1 (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: category 1 (score: high)","unmapped_classification:EPA CTX / Skin-Eye:eye irritation: eye dam. 1 (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: skin corr. 1b (score: very high)","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: skin sens. 1 (score: high)","unmapped_classification:EPA CTX / Skin-Eye:eye irritation: category 8.3a (category 1) (score:","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: category 8.2a (category 1a) (scor","unmapped_classification:EPA CTX / Skin-Eye:skin sensitization: category 6.5b (category 1) (sc","unmapped_classification:EPA CTX / Skin-Eye:skin irritation: in vivo: studies indicate no sign","unmapped_classification:EPA CTX / Skin-Eye:eye irritation: in vivo: studies indicate no signi"]},"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","exposure_inhalation","aquatic_life","human_teen","human_elderly","human_pregnant"]}