Phosphoric malathion

Organophosphorous Compound Containing elements of phosphorous and carbon, the physiological effects of such a compound include inhibition of acetylcholinesterase. A number of pesticides including parathion and malathione, and virtually all nerve agents, are organophosphorous compounds. 

Photolytlc. Malathion absorbs UV light at wavelengths more than 290 nm indicating direct photolysis should occur (Gore et al, 1971). When malathion was exposed to UV light, malathion monoacid, malathion diacid, 0,0-diethyl phosphorothioic acid, dimethyl phosphate, and phosphoric acid were formed (Mosher and Kadoum, 1972). 

Malaoxon and phosphoric acid were reported as ozonation products of malathion in drinking water (Richard and Brener, 1984). 

Bis-0,0-diethylphosphorothionic anhydride, see Sulfotepp Bis(dimethylamino)carbonothioyldisulfide, see Thiram Bis(dimethylthiocarbamoyl)disulfide, see Thiram Bis(dimethylthiocarbamyl)disulfide, see Thiram 5-1,2-Bis (ethoxycarbonyl) ethyl- 0,0-dimethyl phosphor-odithioate, see Malathion... 

Diethyl phosphate, see Sulfotepp Diethyl phosphoric acid, see Diazinon. Parathion Diethyl phosphorothioate, see Diazinon 0,0-Diethyl phosphorothioic acid, see Chlorpyrifos, Diazinon. Malathion, Parathion Diethyl sulfide, see Chlorpyrifos Diethyl thiomalate, see Malathion Diethylthiomaleate, see Malathion Diethylthiophosphoric acid, see Diazinon. Parathion Diethyl-0-thiophosphoric acid, see Parathion... 

Chloroform, Chloropicrin, 1,1-Dichloroethylene, Endrin, Hexachlorocyclopentadiene, Methyl chloride. Methylene chloride, Tetrachloroethylene, 1,1,1 -Trichloroethane, Trichloroethylene Phosphine, see Pentachlorobenzene, Phorate Phosphoric acid, see Dichlorvos, Ethephon. Glvphosate. Malathion, Mevinphos, Parathion, Sulfotepp, Tributyl phosphate, Trichlorfon Phosphoric acid, dimethyl ester, see Mevinphos, Oxvdemeton-methvl Phosphorothioic acid, see Parathion Photoaldrin, see Aldrin Photoaldrin chlorohydrin, see Dieldrin Photodieldrin, see Aldrin, Dieldrin Photoheptachlor, see Heptachlor Photoketoaldrin, see Aldrin Phthalaldehyde, see Naphthalene Phthalaldehydes, see Tolnene Phthalic acid, see Anthracene, Benzo[a]anthracene, Benzyl bntyl phthalate, Dichlone. Diethyl phthalate, Dimethyl phthalate, Naphthalene, Naptalam. I ene... 

Organophosphates such as Malathion are derived from phosphoric acid. 

The destruction of bulk malathion has been carried out in Na/NH3 at Commodore s Marengo, OH facility in a 1200-L unit in 100-lb quantities. Near-stoichiometric quantities of sodium were able to destroy the malathion. The levels of malathion in the treated material were nondetectable. Most bulk samples of organic pesticides and herbicides containing halogens, phosphorous, or sulfur are amenable to reductive destruction using Na/ NH3. Many waste streams were produced when manufacturing pesticides were remediated using solvated electron reductions. 

Malathion is probably the least toxic of the phosphorous-based insecticides nevertheless, it is now the most widely used insecticide in the United States in... 

This subclass contains two sulfur atoms in the phosphoric acid part of the molecule. Mala-thion is a typical phosphorodithioate. It is a safe insecticide controlling household, garden, and greenhouse pests. Malathion has an oral LD30 in rats of 900-5800 mg/kg. 

Because OPs are esters of phosphoric acid or phosphor-othioic acid, they are susceptible to hydrolysis by the A-estcrases. One of the most prominent of the OP insecticides, malathion, contains two carboxylic acid esters and is... 

Dimethyl phosphorodithioate of diethyl mercaptosuccinate. See Malathion 0,0-Dimethyl phosphorothioate-0,0-diester with 4,4 -thiodiphenol. SeeTemephos Dimethyl phosphorous acid. See Dimethyl hydrogen phosphite... 

Besides chlorinated pesticides, some of the phosphorous pesticides are also chiral (see Table 2.1). The phosphorous pesticides also differ in their enantioselective toxicities. These pesticides were introduced in the 1950s to control insects in fruit, vegetables and other crops. Malathion is biotransformed into a racemic malaxon that has anti-acetylcholinesterate (insecticidal) activity. The /f-enantiomer has a 22 times greater inhibitory potency than the 5-enantiomer for bovine erythrocyte cholinesterase [39, 40]. The nerve agent, soman, has two chiral centres, and the two (—)-diastereoisomers are more potent inhibitors than their corresponding (-1-)-counteiparts for acetylcholinesterase and a-chymotrypsin. 

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