| 词条 | Monosodium methyl arsonate |
| 释义 |
| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 441175565 | ImageFile=Monosodium_methyl_arsenate.png | ImageSize=150px | ImageAlt = Skeletal formula of monosodium methyl arsenate | ImageFile1 = Monosodium-methyl-arsenate-3D-balls.png | ImageAlt1 = Ball-and-stick model of the monosodium methyl arsenate molecule | IUPACName=Sodium hydrogen methylarsonate | OtherNames=Monosodium methyl arsenate; sodium methylarsonate; monosodium methane arsonate; methyl arsonic acid monosodium salt; EPA Pesticide Chemical Code 013803 |Section1={{Chembox Identifiers | Abbreviations = MSMA | ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}} | ChemSpiderID = 15697 | SMILES = C[As](=O)(O)[O-].[Na+] | InChI = 1/CH5AsO3.Na/c1-2(3,4)5;/h1H3,(H2,3,4,5);/q;+1/p-1 | InChIKey = JITOKQVGRJSHHA-REWHXWOFAY | StdInChI_Ref = {{stdinchicite|changed|chemspider}} | StdInChI = 1S/CH5AsO3.Na/c1-2(3,4)5;/h1H3,(H2,3,4,5);/q;+1/p-1 | StdInChIKey_Ref = {{stdinchicite|changed|chemspider}} | StdInChIKey = JITOKQVGRJSHHA-UHFFFAOYSA-M | CASNo_Ref = {{cascite|correct|CAS}} | CASNo=2163-80-6 | PubChem=23664719 }} |Section2={{Chembox Properties | Formula=CH4AsNaO3 | MolarMass=161.95 g/mol | Appearance= | Density= | MeltingPt= | BoilingPt= | Solubility= |Section3={{Chembox Hazards | MainHazards= | FlashPt= | AutoignitionPt = }}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] It is a herbicide used against weeds in agriculture, combining selectivity{{Citation needed|date=February 2018}}, low weed-resistance, and cost-efficiency{{Citation needed|date=February 2018}}. Target weeds include: grasses and broad-leaf weeds including some weeds that are resistant to the herbicide Glyphosate.{{Citation needed|date=February 2018}} Weed resistance to herbicides is on the rise due to the use of the herbicides in general, as well as in conjunction with the introduction of genetically modified crops. Resistant crops are endowed with natural resistance to certain herbicides, a resistance which they may impart to non-crops through cross pollination. There are very few, if any, new herbicides capable of economically combating the resistance problem.{{Citation needed|date=February 2018}} With the exception of isolated cases of common cocklebur Xanthium strumarium, no resistance build-up has occurred with the weeds that MSMA controls.{{Citation needed|date=February 2018}} MSMA provides post-emergent selective{{Citation needed|date=February 2018}} annual grass and yellow nutsedge control, in cool season. MSMA can be used to control Convolvulaceae (morning glory) and Cyperus rotundus (nutgrass). Arsenic is classified as a Group-A carcinogen.[1] The EPA states[2] that: 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.[1] Trade names include: {{div col|colwidth=22em}}
References
1. ^1 2 {{cite web |url=https://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.highlight/abstract/6015 |title=Biogeochemistry of Arsenic in Contaminated Soils of Superfund Sites |last1=Dibyendu |first1=Sarkar |last2=Datta |first2=Rupali |date=2007 |website=EPA |publisher=United States Environmental Protection Agency |access-date=25 February 2018 }} {{Herbicides}}2. ^{{cite web |url=https://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.highlight/abstract/6015/report/F |title=Final Report: Biogeochemistry of Arsenic in Contaminated Soils of Superfund Sites |last=Carelton |first=James |date=2007 |website=EPA |publisher=United States Environmental Protection Agency |access-date=25 February 2018 }} 4 : Organoarsenic compounds|Sodium compounds|Arsenical herbicides|Fungicides |
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