O-Methylchlorothiophosphate

O-Methylchlorothiophosphate - Names and Identifiers

Name	O-methyl dichlorothiophosphate
Synonyms	O-Methylchlorothiophosphate O-methyl dichlorothiophosphate Dichloromethoxyphosphine sulfide Dichloro(methoxy)phosphine sulfide O-METHYL THIOPHOSPHORYL DICHLORIDE dichloro-methoxy-sulfanylidene-λ5-phosphane Dichloridothiophosphoric acid O-methyl ester
CAS	2523-94-6
EINECS	219-753-3

O-Methylchlorothiophosphate - Physico-chemical Properties

Molecular Formula	CH3Cl2OPS
Molar Mass	164.978681
Density	1.4949 g/cm3(Temp: 0 °C)
Boling Point	70 °C(Press: 40 Torr)
Storage Condition	Room Temprature
Physical and Chemical Properties	Chemical properties methyl dichloride industrial products are colorless or yellow transparent liquid, B. p.66 ℃/2.13kPa,n25D 1.5124, 1.4929 relative density, insoluble in water, soluble in organic solvents, strong corrosiveness and mucosal stimulation, unstable for long-term placement, should be stored below 5 ℃.
Use	Uses O-methyl thiophosphoryl dichloride (referred to as methyl dichloride) can be used for the synthesis of a series of organophosphorus pesticides, such as thiophosphoramide insecticides isocarbophos, methyl isophos, organic phosphorus heterocyclic insecticide vegetable and fruit phosphorus (salicyclic thiophos), herbicide methyl amine grass phosphorus, etc.; Can also be obtained by isomerization of methamidophos, acephate intermediate S-methyl thiophosphoryl chloride; Can also be further alkoxylation, another important intermediate was obtained. Used as a pesticide intermediate

O-Methylchlorothiophosphate - Upstream Downstream Industry

Raw Materials	THIOPHOSPHORYL CHLORIDE
Downstream Products	Fenitrothion Isocarbophos SALITHION AMIPROFOS METHYL S-METHYL THIOPHOSPHORYL DICHLORIDE

O-Methylchlorothiophosphate - Production method

Methyl dichloride is prepared by the direct reaction of phosphorus trichloride and methanol at low temperature.
The measured thion trichloride is put into the reaction kettle from the high-level tank, and the quantitative methanol is added dropwise at about -10 ℃ under rapid stirring, and the reaction temperature is controlled at (-5±1)℃. After adding methanol, continue to stir for 10min at the same temperature, pump the reaction liquid into a washing kettle with cold water at about 0 ℃, stir for about 2min, then pump the reaction liquid into a separator and stand for separation, and the obtained oil layer is methyl dichloride.

Last Update：2024-04-10 22:29:15