Metam sodium
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| Names | |
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| IUPAC name
Sodium methylaminomethanedithioate
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| Other names
Metham sodium
Carbathion Carbathione Carbothion Metamsodium Metam-sodium | |
| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.004.812 |
PubChem CID
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CompTox Dashboard (EPA)
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| Properties | |
| C2H4NNaS2 | |
| Molar mass | 129.18 g/mol |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Metam sodium is an organosulfur compound (formally a dithiocarbamate), which is used as a soil fumigant, pesticide, herbicide, and fungicide. It is one of the most widely used pesticides in the United States, with approximately 60 million pounds used in 2001.[2] Metam sodium is the sodium salt of methyl dithiocarbamate.
Metam sodium can be prepared from methylamine, carbon disulfide, and sodium hydroxide; or from methyl isothiocyanate and sodium thiolate.[1]
Upon exposure to the environment, metam sodium decomposes to form methyl isothiocyanate.[3]
Metam sodium is a documented cause of reactive airways dysfunction syndrome[citation needed].
In 1991 a tank car with 19,000 gallons of Metam sodium spilled into Sacramento River above Lake Shasta. This killed all fish in a 41-mile stretch of the river. 20 years later the rainbow trout population has recovered.[4]
See also
- Zineb - A related dithiocarbamate salt which is also used as a fungicide
References
- ^ a b Merck Index, 11th Edition, 5860.
- ^ 2000-2001 Pesticide Market Estimates Archived 2009-02-07 at the Wayback Machine, U.S. Environmental Protection Agency
- ^ Review of Metam Sodium, Dazomet, Methylisothiocyanate (MITC), Australian Pesticides and Veterinary Medicines Authority, June 1997
- ^ "Largest chemical spill in California history". dtsc.ca.gov. Retrieved 2017-12-11.
External links
- Metam sodium in the Pesticide Properties DataBase (PPDB)