Di thiophosphates

Presumably intermediate thiophosphoric acids are first formed and, indeed, when the hydrolysis is carried out in aqueous NaOH solution at 100°, substantial amounts of the mono- and di-thiophosphates are obtained. P-S bonds are also retained during reaction of P4S10 with alcohols or phenols and the products formed are used extensively in industry for a wide variety of... 

Metabolism of most OP pesticides yields alkylphosphates or alkyl-(di)-thiophosphates as a result of the hydrolysis of the P-X bond in the OP... 

Peroxide Decomposition Mechanism. Since virtually no work has been reported which concerns only the mechanism by which zinc dialkyl di-thiophosphates act as peroxide decomposers, it is pertinent to discuss metal dialkyl dithiophosphates as a whole. The mechanism has been studied both by investigating the products and the decomposition rates of hydroperoxides in the presence of metal dithiophosphates and by measuring the efficiency of these compounds as antioxidants in hydrocarbon autoxidation systems in which hydroperoxide initiation is significant. 

Effective quenchers are based on nickel complexes (phenolate, dithiocarbamate, di-thiophosphate) and are used almost exclusively in polyolefins at a concentration of 0.2-0.5%. Nickel complexes impart a green coloration to plastic articles and their importance was significantly reduced with the introduction of hindered amine light stabilizers (HALS). 

Phosphorus is a common component of lubricating oil additives. It appears most commonly as a zinc dialkyl di-thiophosphate or a tri-aiyl phosphate ester, but other forms also occur. Two wet chemical methods are available. ASTM Test Method D1091, Test Methods for Phosphorus in Lubricating Oils and Additives, describes an oxidation procedure that converts phosphorus to aqueous ortho-phosphate anion. This is then determined by mass as magnesium pyro-phos-phate or photochemically as molybdi-vanadophosphoric acid. Phosphorus concentrations of 0.0002 to 20.0 mass-% can be accommodated by these procedures. An alternate test is ASTM Test Method D4047, Phosphorus in Lubricating Oils and Additives by Quinoline Phosphomolybdate Method. Samples are oxidized to phosphate with zinc oxide, dissolved in acid, precipitated as quinoline phosphomolybdate, treated with excess standard alkedi, and back-titrated with standard... 

Synonyms AAT AATP AC 3422 ACC 3422 AI3-15108 Alkron Aileron American Cyanamide 3422 Aphamite Aralo B 404 Bay E-605 Bayer E-605 Bladan Bladan F BRN 2059093 C-06604 Caswell No. 637 CCRIS 493 Compound 3422 Corothion Corthion Corthione Danthion DDF 0,0-Diethyl-0-4-nitrophenyl phosphorothioate 0,0-Diethyl 0-p-nitrophenyl phosphorothioate Diethyl-4-nitrophenyl phosphorothionate Diethyl-p-nitrophenyl thionophosphate 0,0-Di-ethyl-0-4-nitrophenyl thionophosphate 0,0-Diethyl-O-p-nitrophenyl thionophosphate Diethyl-p-nitrophenyl thiophosphate 0,0-Diethyl-O-p-nitrophenyl... 

The acaricidc O,0-dicthyl-0-(3,5,6-tnchloro-2-pyridyl) thiophosphatc, known as Dursban, is used to control ectoparasrtes. The similar, O.O-dimethyl-0-3.5,6-tnchloro-2-pyridyl) thiophosphate, tradenamed Reldan and Tumar, is a nonsystemic insecticide/acaiicide. Di(n-propyl)isocincho-inerate, known as MGK Repellent 326 is used in fly repellents and is... 

Organic chemicals that are susceptible to oxidation and are of concern from the perspective of contamination and environmental degradation include aliphatic and aromatic hydrocarbons, alcohols, aldehydes, and ketones phenols, polyphenols, and hydroquinones sulfides (thiols) and sulfoxides nitriles, amines, and diamines nitrogen and sulfur heterocyclic compounds mono- and di-halogenated aliphatics linear alkybenzene-sulfonate and nonylphenol polyethoxylate surfactants and thiophosphate esters. Table... 

Di- and Tri-imido- and -amido-thiophosphates.—A great variety of these compounds, chiefly in the form of their ammonium salts, was obtained by the action of ammonia, usually in the liquid form, on phosphorus pentasulphide.5 Some of the ammonia could be driven off by heating under reduced pressure, leaving the acid salts. 

DIETHYL-2-ETHYLMERCAPT0-ETHYL THIOPHOSPHATE, DI-ETHOXYTHIOPHOSPHORIC ACID or 0,0[DIETHYL-< (and 5)-]2-(ETHYLTHIO)ETHYLPHOSPHORO-THIOATES ( 8 0 6 5 - 4 8 - 3 ) (C2H50)2PS OCH2CH2SC2H5(demeton-0) (C2H50)2PO SCH2CH2SC2H5(demeton-S) Forms explosive mixture with air [explosion limits in air (vol %) 1.0 to 5.3 flashpoint 90... 

Methyl Parathion. Phosphorothioic acid 0,0-di-methyl 0-(4-nitrophenyl) ester O.O-dimethyl O-p-nltro-phenyl phosphorothioate O.O-dimethyl O-p-nitrophenyl thiophosphate dimethyl parathion parathion-methyl meta-phos E 601 ENT-17292 Dalf (obsolete) Fotidot-M Meta-cide Metron Nitrox 80 Penncap M. C,Hl(NOsPS mol wt 263.23. C 36.50%, H 3.83%, N 5.32%, O 30.39%, P lt.77%. S 12.18%. Prepn Fletcher el at., J. Am. Chem. Soc. 72, 2461 (1950). Manuf Faith, Keyes Sc Clark s Industrial Chemicals, F. A. Lowenheim, M. K. Moran, Eds. (Wiley-Intersci-ence. New York, 4th ed., 1975) pp 552-555. Toxicity data T. B. Gaines, Toxicol. Appl. Pharmacol. 14, 515 (1969). 

In the oxide literature, there are several reviews specific to the different families, such as layered transition metal oxides and metal phosphonates. Synthesis of metal nitrides has been discussed by Di Salvo. Precursor synthesis of oxides, chalcogenides and other materials is being pursued with vigour. - Thus, single-molecule precursors of chalcogenide containing compound semiconductors have b n developed. Kanatzidis has reviewed the application of molten poly-chalcophosphate fluxes for the synthesis of complex metal thiophosphates and selenophosphates. 

Synonyms S-(diethylaminoethyl) C),0-di-ethyl phosphorothioate (2-diethylamino) ethylphosphorothioic acid 0,0-diethyl ester 0,0-diethyl S-(5-diethylaminoethyl) thiophosphate Citram Tetram... 

Bis-0,0-di- -propylphosphorothioiuc anhydride, see Aspon 5 -l,2-Bis(ethoxycarbonyl)ethyl-0,0-dimethyl phosphorodithioate, see Malathion 5 -l,2-Bis(ethoxycarbonyl)ethyl-0,0-dimethyl thiophosphate, see Malathion... 

Thiophosphates of the type shown in (9) have been synthesized by phosphorylation of the corresponding 1,2-O-isopropylidene-glucose with tris(di-methylamino)phosphite in absolute pyridine at 80-100 C for two hours. 

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