Metam sodium

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[1]
Names
Preferred IUPAC name
Sodium methylcarbamodithioate
Other names
Metham sodium
Carbathion
Carbathione
Carbothion
Metamsodium
Metam-sodium
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.004.812
PubChem CID
UNII
InChI
  • InChI=1S/C2H5NS2.Na/c1-3-2(4)5;/h1H3,(H2,3,4,5);/q;+1/p-1 Y
    Key: AFCCDDWKHLHPDF-UHFFFAOYSA-M Y
SMILES
  • [Na+].[S-]C(=S)NC
Properties
Chemical formula
 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).
Y verify (what is YN ?)
Infobox references

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.

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. By 20 years later the rainbow trout population had recovered.[4]

See also
  • Zineb - A related dithiocarbamate salt which is also used as a fungicide

References
  1. Merck Index, 11th Edition, 5860.
  2. 2000-2001 Pesticide Market Estimates Archived 2009-02-07 at the Wayback Machine, U.S. Environmental Protection Agency
  3. Review of Metam Sodium, Dazomet, Methylisothiocyanate (MITC), Australian Pesticides and Veterinary Medicines Authority, June 1997
  4. "Largest chemical spill in California history". dtsc.ca.gov. Retrieved 2017-12-11.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.