Wiktionary
isomalathion
n. An impurity found in some batches of malathion, significantly more toxic to humans than malathion.
Wikipedia
Isomalathion
Isomalathion is an impurity found in some batches of malathion, depending on its method of preparation. It is significantly more toxic to humans than malathion.
Category:Phosphorodithioates Category:Succinates