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| {{short description|Arsenic-based herbicide}} | |||
| {{More citations needed|date=February 2018}} | |||
| {{chembox | {{chembox | ||
| | Verifiedfields = changed | |||
| | Watchedfields = changed | | Watchedfields = changed | ||
| | verifiedrevid = |
| verifiedrevid = 441175565 | ||
| |ImageFile=Monosodium_methyl_arsenate.png | | ImageFile=Monosodium_methyl_arsenate.png | ||
| |ImageSize=150px | | ImageSize=150px | ||
| | ImageAlt = Skeletal formula of monosodium methyl arsenate | |||
| ⚫ | |IUPACName=Sodium hydrogen methylarsonate | ||
| | ImageFile1 = Monosodium-methyl-arsenate-3D-balls.png | |||
| ⚫ | |OtherNames=Monosodium methyl arsenate; sodium methylarsonate; monosodium methane arsonate; methyl arsonic acid monosodium salt; EPA Pesticide Chemical Code 013803 | ||
| | 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 | |Section1={{Chembox Identifiers | ||
| | |
| Abbreviations = MSMA | ||
| | |
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}} | ||
| | ChemSpiderID = |
| ChemSpiderID = 15697 | ||
| ⚫ | | SMILES = C(=O)(O). | ||
| | InChI = 1/ |
| InChI = 1/CH5AsO3.Na/c1-2(3,4)5;/h1H3,(H2,3,4,5);/q;+1/p-1 | ||
| | InChIKey = RDXKFMGONHCKSA-NUQVWONBAT | |||
| | InChIKey = JITOKQVGRJSHHA-REWHXWOFAY | |||
| | StdInChI_Ref = {{stdinchicite| |
| StdInChI_Ref = {{stdinchicite|changed|chemspider}} | ||
| | StdInChI = 1S/ |
| StdInChI = 1S/CH5AsO3.Na/c1-2(3,4)5;/h1H3,(H2,3,4,5);/q;+1/p-1 | ||
| | StdInChIKey_Ref = {{stdinchicite| |
| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}} | ||
| | StdInChIKey = |
| StdInChIKey = JITOKQVGRJSHHA-UHFFFAOYSA-M | ||
| | CASNo_Ref = {{cascite|correct|CAS}} | | CASNo_Ref = {{cascite|correct|CAS}} | ||
| | CASNo=2163-80-6 | | CASNo=2163-80-6 | ||
| | UNII_Ref = {{fdacite|correct|FDA}} | |||
| ⚫ | | |
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| | UNII = 600QCW45IV | |||
| ⚫ | | |
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| ⚫ | | PubChem=23664719 | ||
| }} | }} | ||
| |Section2={{Chembox Properties | |Section2={{Chembox Properties | ||
| | |
| Formula=CH<sub>4</sub>AsNaO<sub>3</sub> | ||
| | |
| MolarMass=161.95 g/mol | ||
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| Appearance= | ||
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| Density= | ||
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| MeltingPt= | ||
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| BoilingPt= | ||
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| Solubility= | ||
| }} | }} | ||
| |Section3={{Chembox Hazards | |Section3={{Chembox Hazards | ||
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| MainHazards= | ||
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| FlashPt= | ||
| | AutoignitionPt = | |||
| | Autoignition= | |||
| }} | }} | ||
| }} | }} | ||
| '''Monosodium methyl arsenate''' (MSMA) is an ]-based ]. 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.<ref name="EPA1">{{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 }}</ref> | |||
| '''Monosodium methyl arsenate''' (MSMA) is an ]-based ] and ]. It is an organic ]; but it is a less toxic organic form of ], which has replaced the role of ] in ]. It is one of the most common herbicides used on ]s. It is typically used for control of grassy weeds such as crabgrass. Another common use is for burning the marked lines into grassy sports fields. | |||
| Arsenic is classified as a Group-A ].<ref name="EPA1"/> The EPA states that:<ref>{{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 }}</ref> | |||
| Some of its trade names include Ansar 170, Ansar 170L, Ansar 529, Ansar 529 HC, Ansar 6.6, Asazol, Bueno, Bueno 6, CCRIS 4676, Caswell No. 582, Daconate, Daconate 6, Dal-E-Rad, Dal-E-Rad 120, Drexar, Gepiron, HSDB 754, Herb-All, Herban M, Merge, Merge 823, Mesamate, Mesamate H.C., Mesamate-400, and Mesamate-600. | |||
| {{blockquote|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: | |||
| ==See also== | |||
| {{div col|colwidth=22em}} | |||
| *Target 6 Plus | |||
| *Target 6.6 | |||
| *MSMA 6 Plus | |||
| *MSMA 6.6 | |||
| {{div col end}} | |||
| * ] | |||
| * ] | |||
| == |
==References== | ||
| {{refstyle}} | |||
| {{reflist}} | |||
| *{{cite web | last=Agency for Toxic Substances & Disease Registry | title=Arsenic Toxicity Case Study | work=Environmental Health and Medicine Education | access-date=25 December 2013 | url=https://www.atsdr.cdc.gov/csem/csem.html}} | |||
| * | |||
| *{{cite web | author=MAA Research Task Force | title=Organic Arsenical Products Task Force | url=http://www.maatf.com/index.html}} | |||
| * | |||
| * |
*{{cite web | author=National Library of Medicine | title=Sodium Methanearsonate | work=HSDB Database | url=http://toxnet.nlm.nih.gov/cgi-bin/sis/search/r?dbs+hsdb:@term+@rn+@rel+2163-80-6}} | ||
| ;Specific | |||
| <references /> | |||
| {{Herbicides}} | {{Herbicides}} | ||
| ] | |||
| ] | ] | ||
| ] | ] | ||
| ] | ] | ||
| ] | ] | ||
| ] | |||
| ] | |||
Latest revision as of 23:50, 29 December 2023
Arsenic-based herbicide | This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed. Find sources: "Monosodium methyl arsonate" – news · newspapers · books · scholar · JSTOR (February 2018) (Learn how and when to remove this message) |
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| 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 | |
| 3D model (JSmol) | |
| Abbreviations | MSMA |
| ChemSpider | |
| ECHA InfoCard | 100.016.815 
|
| PubChem CID | |
| UNII | |
| CompTox Dashboard (EPA) | |
InChI
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SMILES
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| 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 , 100 kPa).
 N verify (what is ?)
Infobox references
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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.
Arsenic is classified as a Group-A carcinogen. The EPA states that:
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
- 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
- ^ Dibyendu, Sarkar; Datta, Rupali (2007). "Biogeochemistry of Arsenic in Contaminated Soils of Superfund Sites". EPA. United States Environmental Protection Agency. Retrieved 25 February 2018.
- Carelton, James (2007). "Final Report: Biogeochemistry of Arsenic in Contaminated Soils of Superfund Sites". EPA. United States Environmental Protection Agency. Retrieved 25 February 2018.