{"hq_id":"hq-c-org-000319","name":"Methyl ethyl ketone","context":"human_adult","timestamp":"2026-08-28T02:52:45.844Z","risk_level":"low","risk_profile":{"magnitude":{"mean":0.2,"weightedMean":0.2,"std_dev":0,"confidence_interval_95":[0.2,0.2],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.2,"weight":0.35}]},"confidence":{"mean":0.5,"weightedMean":0.5,"std_dev":0,"confidence_interval_95":[0.5,0.5],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.5,"weight":0.35}]},"recency":{"mean":1,"weightedMean":1,"std_dev":0,"confidence_interval_95":[1,1],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":1,"weight":0.35}]},"methodology":{"mean":0.7,"weightedMean":0.7,"std_dev":0,"confidence_interval_95":[0.7,0.7],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.7,"weight":0.35}]},"specificity":{"mean":0.92,"weightedMean":0.92,"std_dev":0,"confidence_interval_95":[0.92,0.92],"source_positions":[{"source":"HQ_DIRECT","year":2026,"value":0.92,"weight":0.35}]},"consensus":{"exists":false,"strength":0,"disagreement_magnitude":0,"warning":"single_source_warning"}},"interpretation":{"summary":"Single source (HQ_DIRECT, 2026) indicates low risk.","confidence_note":"Evidence quality varies; interpretation requires caution.","context_note":null,"warning":"single_source_warning"},"sources":[{"id":"niosh_mek_2019","type":"regulatory","title":"NIOSH Pocket Guide: Methyl Ethyl Ketone (MEK) — IDLH 3000 ppm; PEL 200 ppm; n-hexane neuropathy potentiation via CYP2E1; coating/adhesive uses; flash point −9°C; A4 carcinogen classification (2019)","year":2019},{"id":"epa_mek_voc","type":"regulatory","title":"EPA: Methyl Ethyl Ketone — VOC ozone formation; GRAS food flavoring; printing ink solvent; auto refinishing; shoe industry neuropathy outbreaks from MEK+hexane mixtures (2020)","year":2020}],"sources_scope":"context","warnings":["unmapped_classification:OSHA:occupational exposure limit","unmapped_classification:EPA CTX / IRIS:data are inadequate for an assessment of human car","unmapped_classification:EPA CTX / EPA OPP:group d not classifiable as to human carcinogenici","unmapped_classification:EPA CTX / Genetox:genotoxicity: positive (ames: positive, 9 positive","unmapped_classification:EPA CTX / Genetox:genotoxicity: positive (ames: positive, 9 positive","single_source_warning"],"meta":{"synthesis_version":"1.1.0","config_version":"1.1.0","n_sources":1,"db_version":48,"warnings":["unmapped_classification:OSHA:occupational exposure limit","unmapped_classification:EPA CTX / IRIS:data are inadequate for an assessment of human car","unmapped_classification:EPA CTX / EPA OPP:group d not classifiable as to human carcinogenici","unmapped_classification:EPA CTX / Genetox:genotoxicity: positive (ames: positive, 9 positive","unmapped_classification:EPA CTX / Genetox:genotoxicity: positive (ames: positive, 9 positive"]},"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","exposure_dermal","human_teen","human_elderly","human_infant","human_pregnant","exposure_ingestion","exposure_ocular","occupational_exposure"]}