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Find sources: "Monosodium methyl arsonate" – news · newspapers · books · scholar · JSTOR (February 2018) (Learn how and when to remove this template message) | Monosodium methyl arsonate Names IUPAC name Sodium hydrogen methylarsonate Other names Monosodium methyl arsenate; sodium methylarsonate; monosodium methane arsonate; methyl arsonic acid monosodium salt; EPA Pesticide Chemical Code 013803 Identifiers CAS Number * 2163-80-6 Y 3D model (JSmol) * Interactive image Abbreviations | MSMA ChemSpider | * 15697 N ECHA InfoCard | 100.016.815 PubChem CID * 23664719 UNII | * 600QCW45IV Y CompTox Dashboard (EPA) * DTXSID2025686 InChI * InChI=1S/CH5AsO3.Na/c1-2(3,4)5;/h1H3,(H2,3,4,5);/q;+1/p-1 N Key: JITOKQVGRJSHHA-UHFFFAOYSA-M N * InChI=1/CH5AsO3.Na/c1-2(3,4)5;/h1H3,(H2,3,4,5);/q;+1/p-1 Key: JITOKQVGRJSHHA-REWHXWOFAY SMILES * C[As](=O)(O)[O-].[Na+] Properties Chemical formula | CH4AsNaO3 Molar mass | 161.95 g/mol Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N verify (what is YN ?) Infobox references Chemical compound Monosodium methyl arsenate (MSMA) is an arsenic-based herbicide. It is an organo-arsenate; less toxic than the inorganic form of arsenates. However, the EPA states that all forms of arsenic are a serious risk to human health and the United States' Agency for Toxic Substances and Disease Registry ranked arsenic as number 1 in its 2001 Priority List of Hazardous Substances at Superfund sites.[1] Arsenic is classified as a Group-A carcinogen.[1] The EPA states that:[2] > Arsenate (AsV) is the oxidized form and occurs in well-aerated soils, whereas in chemically-reduced soil environments, arsenite (AsIII) is the prevalent As form. Although arsenite is more toxic than arsenate, arsenate can also have deleterious effects on humans, plants, and microorganisms. Arsenic-contaminated soils pose serious risk to human health. The EPA also states that, while contaminated soil poses a serious risk to health, arsenic frequently mobilizes from soils and other sources, ending up in water where it is even more of a toxicity issue. Trade names include: * Target 6 Plus * Target 6.6 * MSMA 6 Plus * MSMA 6.6 ## References[edit] * Agency for Toxic Substances & Disease Registry. "Arsenic Toxicity Case Study". Environmental Health and Medicine Education. Retrieved 25 December 2013. * MAA Research Task Force. "Organic Arsenical Products Task Force". * National Library of Medicine. "Sodium Methanearsonate". HSDB Database. Specific 1. ^ a b Dibyendu, Sarkar; Datta, Rupali (2007). "Biogeochemistry of Arsenic in Contaminated Soils of Superfund Sites". EPA. United States Environmental Protection Agency. Retrieved 25 February 2018. 2. ^ Carelton, James (2007). "Final Report: Biogeochemistry of Arsenic in Contaminated Soils of Superfund Sites". EPA. United States Environmental Protection Agency. Retrieved 25 February 2018. * v * t * e Pest control: herbicides Anilides/anilines| * acetochlor * alachlor * asulam * benfluralin * butachlor * diethatyl * diflufenican * dimethenamid * flamprop * metazachlor * metolachlor * oryzalin * pendimethalin * pretilachlor * propachlor * propanil * trifluralin Aromatic acids| * aminopyralid * chloramben * clopyralid * dicamba * picloram * pyrithiobac * quinclorac * quinmerac Arsenicals| * cacodylic acid * copper arsenate * DSMA * MSMA HPPD inhbitors| * mesotrione * sulcotrione * nitisinone * leptospermone * sethoxydim * flurochloridone Organophosphorus| * bensulide * bialaphos * ethephon * fosamine * glufosinate * glyphosate * piperophos Phenoxy| | Auxins| * 2,4-D * 2,4-DB * dichlorprop * fenoprop * MCPA * MCPB * mecoprop * 2,4,5-T | ACCase inhibitors| | FOP herbicides| * diclofop * chlorazifop * fenoxaprop * fluazifop * haloxyfop * quizalofop | DIM herbicides| * sethoxydim Protox inhibitors| | Nitrophenyl ethers| * acifluorfen * bifenox * fluorodifen * fomesafen * lactofen * nitrofen * oxyfluorfen | Pyrimidinediones| * butafenacil * saflufenacil Triazolinones| * carfentrazone * sulfentrazone Pyridines| * dithiopyr * fluroxypyr * imazapyr * thiazopyr * triclopyr Quaternary| | Photosystem I inhibitors| * cyperquat * diquat * paraquat | Triazines| | Photosystem II inhibitors| * ametryn * atrazine * cyanazine * hexazinone * prometon * prometryn * propazine * simazine * simetryn * terbuthylazine * terbutryn | Ureas| | Photosystem II inhibitors| * chlortoluron * DCMU * linuron * monuron * monolinuron * tebuthiuron | ALS inhibitors| * chlorsulfuron * flazasulfuron * metsulfuron-methyl * sulfometuron-methyl Others| * 3-AT * aclonifen * aminocyclopyrachlor * Bentazon * bromoxynil * clomazone * DCBN * dinoseb * indaziflam * juglone * methazole * metam sodium * metamitron * metribuzin * pyribenzoxim * Ziram *[CID]: Compound ID *[EPA]: U.S. Environmental Protection Agency *[v]: View this template *[t]: Discuss this template *[e]: Edit this template