Demeton-S-methyl

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search
Demeton-S-methyl[1]
Demeton-S-methyl.png
Names
IUPAC name
O,O-Dimethyl S-2-(ethylsulfanyl)ethyl phosphorothioate
Other names
1-(Dimethoxyphosphorylthio)-2-(ethylthio)ethane
S-[2-(Ethylthio)ethyl] O,O-dimethyl phosphorothioate, Demeton methyl; O,O-Dimethyl 2-ethylmercaptoethyl thiophosphate; Metasystox; Methyl mercaptophos; Methyl systox
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.011.866
KEGG
Properties
C6H15O3PS2
Molar mass 230.28 g/mol
Appearance Oily, colorless to pale-yellow liquid[2]
Density 1.2 g/cm3
Boiling point 118 °C (244 °F; 391 K)
0.33 g/100 ml (20 °C)
Vapor pressure 0.0004 mmHg (20°C)[2]
Hazards
R-phrases (outdated) R24/25 R51/53
S-phrases (outdated) (S1/2) S28 S36/37 S45 S61
US health exposure limits (NIOSH):
PEL (Permissible)
N.D.[2]
REL (Recommended)
TWA 0.5 mg/m3 [skin][2]
IDLH (Immediate danger)
N.D.[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☑Y verify (what is ☑Y☒N ?)
Infobox references

Demeton-S-methyl is an organic compound with the molecular formula C6H15O3PS2. It was used as an organothiophosphate acaricide and organothiophosphate insecticide. It is flammable. With prolonged storage, Demeton-S-methyl becomes more toxic due to formation of a sulfonium derivative which has greater affinity to the human form of the acetylcholinesterase enzyme, and this may present a hazard in agricultural use.[3]

See also[edit]

References[edit]

  1. ^ Demeton-S-methyl at INCHEM
  2. ^ a b c d e "NIOSH Pocket Guide to Chemical Hazards #0410". National Institute for Occupational Safety and Health (NIOSH). 
  3. ^ Black RM, Harrison JM. The chemistry of organophosphorus chemical warfare agents. Chapter 10 of The chemistry of organophosphorus compounds. Volume 4, Ter- and quinque-valent phosphorus acids and their derivatives. (1996) ISBN 0-471-95706-2