Parathion methyl, or methyl parathion, is an organophosphateinsecticide, possessing an organothiophosphate group. It is structurally very similar to parathion-ethyl. It is not allowed for sale and import in nearly all countries around the world, while a few allow it under subject to specified conditions only.
Parathion methyl has been restricted for many years. It is classified as Extremely Hazardous (Ia) by the World Health Organization and it is classified as Severely Hazardous by the Rotterdam Convention. It is not allowed for sale and import in nearly all countries around the world, while a few allow it under subject to specified conditions only.[6][7][8][9]
^Annex III Chemicals: Methyl-parathion (Emulsifiable concentrates (EC) at or above 19.5% active ingredient and dusts at or above 1.5% active ingredient), Rotterdam Convention
May 10, 2024
parathion, methyl, methyl, parathion, organophosphate, insecticide, possessing, organothiophosphate, group, structurally, very, similar, parathion, ethyl, allowed, sale, import, nearly, countries, around, world, while, allow, under, subject, specified, conditi. Parathion methyl or methyl parathion is an organophosphate insecticide possessing an organothiophosphate group It is structurally very similar to parathion ethyl It is not allowed for sale and import in nearly all countries around the world while a few allow it under subject to specified conditions only Parathion methyl Names IUPAC name O O Dimethyl O p nitrophenylphosphorothioate Other names Azophos Methyl parathion O O Dimethyl O 4 nitrophenyl phosphorothioate O O Dimethyl p nitrophenylthionophosphate Identifiers CAS Number 298 00 0 Y 3D model JSmol Interactive image ChemSpider 3987 ECHA InfoCard 100 005 501 EC Number 015 035 00 7 PubChem CID 4130 RTECS number TG0175000 UNII 41BCL2O91D Y UN number 2783 CompTox Dashboard EPA DTXSID1020855 InChI InChI 1S C8H10NO5PS c1 12 15 16 13 2 14 8 5 3 7 4 6 8 9 10 11 h3 6H 1 2H3Key RLBIQVVOMOPOHC UHFFFAOYSA NInChI 1 C8H10NO5PS c1 12 15 16 13 2 14 8 5 3 7 4 6 8 9 10 11 h3 6H 1 2H3Key RLBIQVVOMOPOHC UHFFFAOYAW SMILES COP S OC Oc1ccc cc1 N O O Properties Chemical formula CH3O 2P S OC6H4NO2 Molar mass 263 2 g mol Appearance White to tan crystalline solid or powder 1 Odor pungent garlic like 1 Density 1 36 g mL 20 C 1 Melting point 37 C 99 F 310 K 1 Boiling point 143 C 289 F 416 K 1 Solubility in water 0 006 25 C 1 Vapor pressure 0 00001 mmHg 20 C 1 Hazards Occupational safety and health OHS OSH Main hazards reactive with strong oxidizers and water 1 Lethal dose or concentration LD LC LD50 median dose 67 mg kg rat dermal 2 10 25 mg kg male rat oral 3 24 mg kg female rat oral 3 NIOSH US health exposure limits PEL Permissible none 1 REL Recommended TWA 0 2 mg m3 skin 1 IDLH Immediate danger N D 1 Except where otherwise noted data are given for materials in their standard state at 25 C 77 F 100 kPa Infobox references Contents 1 Applications 2 Trade Names 3 Safety 4 Classifications and restrictions 5 ReferencesApplications editParathion methyl is used as an insecticide on crops including cotton 2 Trade Names editPenncap M Metacide 4 Safety editPeople can be exposed to parathion methyl in the workplace by breathing it in getting it on their skin swallowing it or getting it in their eyes Since it is an acetylcholinesterase inhibitor symptoms of exposure to parathion methyl include irritated eyes and skin nausea and vomiting abdominal pain diarrhea salivation feeling weak and tired headache runny nose tightness in the chest blurry vision pupil constriction irregular heartbeat muscle twitches fasciculation and difficulty breathing 5 1 In the United States the Occupational Safety and Health Administration OSHA has not set a legal limit permissible exposure limit for parathion methyl exposure in the workplace The National Institute for Occupational Safety and Health NIOSH has set a recommended exposure limit REL of 0 2 mg m3 over an 8 hour workday 1 Classifications and restrictions editParathion methyl has been restricted for many years It is classified as Extremely Hazardous Ia by the World Health Organization and it is classified as Severely Hazardous by the Rotterdam Convention It is not allowed for sale and import in nearly all countries around the world while a few allow it under subject to specified conditions only 6 7 8 9 References edit a b c d e f g h i j k l m NIOSH Pocket Guide to Chemical Hazards 0427 National Institute for Occupational Safety and Health NIOSH a b Skin notation profile Methyl Parathion PDF NIOSH a b Methyl Parathion 1988 OSHA PEL Project Documentation NIOSH 28 September 2011 Methyl Parathion Penncap M Chemical Profile 4 85 Cornell edu Journal of Toxicology and Environmental Health B Critical Review 2003 Methyl parathion a review of health effects PubMed CABI Plantwise Plantwise Pesticide Red List WHO 2010 The WHO Recommended Classification of Pesticides by Hazard p5 IPCS Rotterdam Convention Annex III Chemicals Annex III Chemicals Methyl parathion Emulsifiable concentrates EC at or above 19 5 active ingredient and dusts at or above 1 5 active ingredient Rotterdam Convention Retrieved from https en wikipedia org w index php title Parathion methyl amp oldid 1113696111, wikipedia, wiki, book, books, library,
