{"query":{"parameter":"styrene","place":"MX","medium":null,"statistic":null,"kind":null},"searched":{"places":["MX"],"parameter_keys":["cas:100-42-5","cas:98-83-9","cas:25767-47-9","cas:64614-15-9","cas:9003-70-7","cas:68938-27-2","cas:622-97-9","cas:25750-06-5","cas:25013-15-4","name:styrene-acrylonitrile [san] trimer","cas:57964-39-3","cas:57964-40-6","cas:96-09-3"],"names_matched":[["styrene","cas:100-42-5"],["a methyl styrene","cas:98-83-9"],["butyl acrylate styrene polymer","cas:25767-47-9"],["butyl methacrylate butyl acrylate styrene methyl methacrylate propylene glycol monoacrylate acrylic acid polymer","cas:64614-15-9"],["divinylbenzene styrene polymer","cas:9003-70-7"],["fatty acids soya polymers with acrylonitrile crotonic acid 2 ethylhexyl acrylate me methacrylate pentaerythritol phthalic anhydride and styrene","cas:68938-27-2"],["methyl 4 styrene","cas:622-97-9"],["methyl methacrylate 2 ethylhexyl acrylate styrene polymer","cas:25750-06-5"],["methyl styrene","cas:25013-15-4"],["methyl styrene alpha","cas:98-83-9"],["methyl styrene mixed","cas:25013-15-4"],["methyl styrene mixed isomers","cas:25013-15-4"],["p methyl styrene","cas:622-97-9"],["styrene acrylonitrile san trimer","name:styrene-acrylonitrile [san] trimer"],["styrene acrylonitrile san trimer all isomers","name:styrene-acrylonitrile [san] trimer"],["styrene acrylonitrile san trimer thna isomer","cas:57964-39-3"],["styrene acrylonitrile san trimer thnp isomer","cas:57964-40-6"],["styrene divinylbenzene copolymer","cas:9003-70-7"],["styrene oxide","cas:96-09-3"]],"match":"exact+contains","order":"The place's own instruments first, then each place above it, each in its register's order"},"total":1,"offset":0,"returned":1,"next_offset":null,"rows":[{"id":"49cc6ea389c9ef48","parameter":"Estireno","value":"20","value_num":20,"unit":"µg/L","direction":"max","kind":"limit","medium":"drinking_water","level":"national","parameter_key":"cas:100-42-5","place":["MX"],"conditions":["grupo de compuestos orgánicos sintéticos: Compuestos orgánicos volátiles no halogenados"],"cite":{"instrument":"mx_nom127_ssa1_2021","title":"NOM-127-SSA1-2021 — Agua para uso y consumo humano. Límites permisibles de la calidad del agua: Tablas 1 to 14 and Apéndice A Normativo, Tablas A.1 to A.3","issuer":"Secretaría de Salud (Comisión Federal para la Protección contra Riesgos Sanitarios), Estados Unidos Mexicanos","edition":"DOF 02/05/2022 (in force 360 natural days from the day after publication — 10. Vigencia; turbidity 3.0 UNT from the second year after entry into force — Tabla 1 note a; fluoride 1.0 mg/L, arsenic 0.01 mg/L and cadmium 0.003 mg/L one, three or six years after entry into force by locality size — Tablas 3 and 5; repeals the 2000 modification of NOM-127-SSA1-1994 — Transitorio Único)","source_url":"https://dof.gob.mx/nota_detalle.php?codigo=5650705&fecha=02/05/2022","source_sha256":"ccafe3317244274e237d8bfc92051f8396f8d3342782d37d7b4e954099889b46","fetched_at":"2026-10-15","source_status":{"checked":"2026-10-16","status":"not verified"},"section":"NOM-127-SSA1-2021, Tabla 14 (compuestos orgánicos sintéticos)","page":null,"quote":"Estireno 20 µg/L"}}],"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":"MX"},"needs":{"rows":"Your user's measured results, as their table prints them: [{parameter: \"styrene\", value, unit}, ...], any other parameters too."},"post":"/api/v1/check","url":"https://passage-data.com/api/v1/check","page":"https://passage-data.com/limits/MX/styrene#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":"MX"},"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","url":"https://passage-data.com/api/v1/certificate","page":"https://passage-data.com/limits/MX/styrene#check"}]}