Names | |
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Preferred IUPAC name
Diethyl {[methoxy(methylsulfanyl)phosphoryl]sulfanyl}butanedioate | |
Other names
S-Methylmalathion
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Identifiers | |
3D model (
JSmol)
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ChemSpider | |
PubChem
CID
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UNII | |
CompTox Dashboard (
EPA)
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Properties | |
C10H19O6PS2 | |
Molar mass | 330.36 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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Isomalathion is an impurity found in some batches of malathion. Whereas the structure of malation is, generically, RSP(S)(OCH3)2, the connectivity of isomalathion is RSPO(SCH3)(OCH3). It arises by heating malathion. Being significantly more toxic to humans than malathion, it has resulted in human poisonings. [1]
In 1976, numerous malaria workers in Pakistan were poisoned by isomalathion. [2] It is an inhibitor of carboxyesterase.