Journal of environmental science and health. Part. B, Pesticides, food contaminants, and agricultural wastes, 18(1), 89-117 (1983-01-01)
Impurities such as O,S,S-trimethyl phosphorodithioate (TMPD) and the S-methyl isomer of malathion (isomalathion) strongly potentiated the mammalian toxicity of malathion. In contrast, impurities present in the phosphoramidothioate insecticide acephate had an antagonizing effect on its mammalian toxicity. The potentiation of
Isomalathion is a major impurity of technical grade malathion, one of the most abundantly applied insecticides; however little is known about its hepatotoxicity. In the present study, cytotoxicity and genotoxicity of malathion and isomalathion either individually or in combination, were
Chemical research in toxicology, 6(5), 724-730 (1993-09-01)
The biomolecular reaction constants (ki), dissociation constants (Kd), and phosphorylation constants (kp) were determined for the enantiomers of malaoxon against rat brain acetylcholinesterase, and for the stereoisomers of isomalathion against rat brain acetylcholinesterase and electric eel acetylcholinesterase. (R)-Malaoxon was an
Toxicology and applied pharmacology, 155(1), 43-53 (1999-02-26)
Inhibition of acetylcholinesterase (AChE) by isomalathion has been assumed to proceed by expulsion of diethyl thiosuccinyl to produce O, S-dimethyl phosphorylated AChE. If this assumption is correct, AChE inhibited by (1R)- or (1S)-isomalathions should reactivate at the same rate as
Chemical research in toxicology, 6(5), 718-723 (1993-09-01)
Syntheses of the enantiomers of malathion, malaoxon, and isomalathion are reported herein. Malathion enantiomers were prepared from (R)- or (S)-malic acid in three steps. Enantiomers of malathion were converted to the corresponding enantiomers of malaoxon in 52% yield by oxidation