{"query":{"parameter":"crotonic acid","place":"CA-QC","medium":null,"statistic":null,"kind":null},"searched":{"places":["CA-QC","CA"],"parameter_keys":["cas:3724-65-0","cas:68938-27-2","cas:107-93-7"],"names_matched":[["crotonic acid","cas:3724-65-0"],["fatty acids soya polymers with acrylonitrile crotonic acid 2 ethylhexyl acrylate me methacrylate pentaerythritol phthalic anhydride and styrene","cas:68938-27-2"],["acide crotonique","cas:107-93-7","acide crotonique"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order","not_sent":{"rows":4,"names":["Fatty acids, soya, polymers with acrylonitrile, crotonic acid, 2-ethylhexyl acrylate, Me methacrylate, pentaerythritol, phthalic anhydride and styrene","Acide crotonique"],"says":"4 rows share a parameter key with a longer name holding \"crotonic acid\" but are printed under names without these words (that key is wider than the name), or keyed to a CAS number \"crotonic acid\" does not name (another substance, whatever words its name holds): not sent. Ask for one by its name or CAS number."}},"total":1,"offset":0,"returned":1,"next_offset":null,"rows":[{"id":"f2f67cbc049ae562","parameter":"Acide crotonique","value":"5.59","value_num":5.59,"unit":"µg/m³","statistic":"hourly_avg","direction":"max","kind":"guideline","medium":"ambient_air","level":"regional","parameter_key":"cas:3724-65-0","place":["CA-QC"],"conditions":[],"cite":{"instrument":"ca_qc_air","title":"MELCCFP — Normes et critères québécois de qualité de l'atmosphère (version 11)","issuer":null,"edition":"Version 11","source_url":"https://environnement.gouv.qc.ca/air/criteres/normes-criteres-qualite-atmosphere.xlsx","source_sha256":null,"fetched_at":null,"source_status":{"checked":"2026-10-15","status":"not verified"},"section":null,"page":null,"quote":null,"column":"valeur"}}],"next":[{"tool":"check_values","says":"Has your user measured this? check_values sets each of their results beside every row held here, with a verdict and the row's cite.","arguments":{"place":"CA-QC"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"crotonic acid\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check"},{"tool":"read_certificate","says":"Has your user a laboratory certificate? read_certificate reads every row it prints, each with its page, and checks them against these limits.","arguments":{"place":"CA-QC"},"needs":{"content_base64":"The laboratory's certificate (PDF) or its XLSX, XLS or CSV export, as base64; or file_url, a public https address of it."},"post":"/api/v1/certificate"}]}