O,O-Dimethyl phosphorodithioate
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O,O-Dimethyl phosphorodithioate
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CAS No:
756-80-9
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Formula:
C2H7O2PS2
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Chemical Name:
O,O-Dimethyl phosphorodithioate
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Synonyms:
Phosphorodithioic acid,O,O-dimethyl ester;Methyl phosphorodithioate;O,O-Dimethyl dithiophosphate;O,O-Dimethyl phosphorodithioic acid;O,O-Dimethyl hydrogen dithiophosphate;O,O-Dimethyl dithiophosphoric acid;O,O-Dimethyl phosphorodithioate;O,O′-Dimethyl hydrogen dithiophosphate;O,O′-Dimethyl dithiophosphate
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CAS No:
Characteristics
51.6
2.08410
1.2888 g/cm3 @ Temp: 20 °C
62-63 °C @ Press: 4.5 Torr
71.2ºC
1.535
-20°C
Safety Information
P210, P260, P264, P270, P271, P273, P280, P284, P301+P312, P304+P340, P310, P320, P330, P370+P378, P403+P233, P403+P235, P405, P501
H227
|Danger|H226 (100%): Flammable liquid and vapor [Warning Flammable liquids]|P201, P202, P210, P233, P234, P240, P241, P242, P243, P260, P261, P264, P270, P271, P273, P280, P281, P301+P312, P301+P330+P331, P303+P361+P353, P304+P312, P304+P340, P305+P351+P338, P308+P313, P310, P312, P321, P330, P363, P370+P378, P390, P403+P235, P404, P405, and P501|Aggregated GHS information provided by 91 companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.|H227: Combustible liquid [Warning Flammable liquids]|P210, P260, P264, P270, P271, P280, P284, P301+P312, P304+P340, P310, P320, P330, P370+P378, P403+P233, P403+P235, P405, and P501
AN ORGANOPHOSPHATE CONTAINING WASTEWATER IS TREATED AT PH 5-7.5 WITH ACTIVATED SLUDGE. THUS, AN ACTIVATED SLUDGE WAS ACCLIMATIZED IN A CULTURE MEDIUM CONTAINING DIMETHYL DITHIOPHOSPHATE AMMONIUM SALT; THEN THE SLUDGE WAS USED TO TREAT A DIMETHYL DITHIOPHOSPHATE CONTAINING WASTEWATER. THE TOTAL ORG C OF 83-87 PPM WAS REDUCED TO 17-19 PPM AFTER 12 HR OF TREATMENT.|THE ACTIVATED SLUDGE WAS ACCLIMATED TO O,O-DIMETHYL PHOSPHORODITHIOATE BY THE FILL & DRAW METHOD. THE ACCLIMATED, ACTIVATED SLUDGE DEGRADE 500 MG/L IN 7 HR. THE PH OF THE MIXED LIQUOR WAS ADJUSTED TO DEGRADE O,O-DIMETHYL PHOSPHORODITHIOATE & THE OPTIMUM PH WAS 6.5-7.0.
O,O-DIMETHYL PHOSPHORODITHIOATE IS A PRECURSOR IN THE PRODUCTION OF SUCH ORGANOPHOSPHORUS PESTICIDES AS MALATHION, DIMETHOATE, ETC, & IS ABUNDANT IN WASTE-WATER OF PESTICIDE MFR.
Toxicity
O,O-DIMETHYL DITHIOPHOSPHATE IS PRODUCED AS METABOLITE FROM MANY ORGANOPHOSPHATE INSECTICIDES IN SOIL... EXAMPLES OF SUCH ORGANOPHOSPHATES ARE PHENTHOATE, MALATHION, DIMETHOATE, & SUPRACIDE.
DIMETHYL PHOSPHATE & ITS THIODERIVATIVES WERE EXCRETED IN URINE OF HUMANS AFTER OCCUPATIONAL EXPOSURE TO ORGANOPHOSPHORUS PESTICIDES.
Drug Information
IN THE UNITED STATES ON A NATIONAL BASIS FOR FISCAL YEAR 1970-74 ANALYSIS OF 267 URINE SAMPLES FROM GENERAL POPULATION REVEALED THE PRESENCE OF DIALKYL PHOSPHATE.
O,O-DIMETHYL DITHIOPHOSPHATE IS PRODUCED AS METABOLITE FROM MANY ORGANOPHOSPHATE INSECTICIDES IN...PLANTS /&/ ANIMALS... EXAMPLES OF SUCH ORGANOPHOSPHATES ARE PHENTHOATE, MALATHION, DIMETHOATE, & SUPRACIDE.
DMDTP
O,O-Dimethyl phosphorodithioate Use and Manufacturing
Methyl sulfide is prepared by esterification reaction between phosphorus pentasulfide and methanol. Add a certain amount of sulfide to phosphorus pentasulfide in a mass ratio of about 0.7:1 into the reaction tank, add methanol dropwise at a certain molar ratio under stirring, and control the dropping temperature at 40～45°C. The addition is completed in about 2 hours, and then at 50 Continue to stir and react at ~55°C for about 2h, cool to 35°C and discharge the finished product. The yield is above 75%. The hydrogen sulfide generated by the reaction is introduced into the absorption tower and absorbed by lye. Domestically, a new process of catalytic method is used to synthesize methyl sulfide, which improves product quality and yield. By selecting a suitable catalyst and certain reaction conditions, an average methyl sulfide content of 94.20% and an average yield of 93.84% can be obtained.
O,O-Dimethyl phosphorodithioate, referred to as methyl sulfide, is an important organophosphorus pesticide intermediate. It can directly synthesize the pesticides Dimethoate, malathion, iminothion, and rice Fengsan. The herbicide sassafras phosphorus, the fungicide Kezhanzhuang, etc. can also be obtained by chlorination to obtain another organic phosphorus intermediate O, O-dimethyl thiophosphoryl chloride.
(1978) 7.0X10+9 G-EST PRODN FOR PESTICIDE USE|(1982) 7.0X10+9 G-EST PRODN FOR PESTICIDE USE
ESSENTIALLY 100% AS A CHEM INT FOR INSECTICIDES
Phosphorodithioic acid, O,O-dimethyl ester: INACTIVE|A SAMPLE OF TECHNICAL GRADE MALATHION CONTAINED O,O-DIMETHYL DITHIOPHOSPHATE.
GAS CHROMATOGRAPHIC MONITORING PROGRAM DESIGNED TO DETECT HUMAN EXPOSURE TO ORGANOPHOSPHATE PESTICIDES FROM ANALYSIS OF ALKYL PHOSPHATE METABOLITES IN URINE.|THE ANALYSIS OF URINE FOR O,O-DIMETHYL PHOSPHORODITHIOATE, A SCREENING METHOD, IS GIVEN FOR RAPID ASSESSMENT OF HUMAN EXPOSURE. THE REACTION PRODUCTS WERE DETERMINED BY GAS CHROMATOGRAPHY ON ROUTINE PESTICIDE COLUMN UTILIZING P-SPECIFIC FLAME PHOTOMETRIC DETECTOR.
Environmental transformation -> Pesticide transformation products (metabolite, successor)
O,O-Dimethyl hydrogen phosphorodithioate is a known environmental transformation product of Phosmet.
Computed Properties
Molecular Weight:158.18
XLogP3:1.7
Hydrogen Bond Donor Count:1
Hydrogen Bond Acceptor Count:4
Rotatable Bond Count:2
Exact Mass:157.96250881
Monoisotopic Mass:157.96250881
Topological Polar Surface Area:51.6
Heavy Atom Count:7
Complexity:85.7
Covalently-Bonded Unit Count:1
Compound Is Canonicalized:Yes
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