Some knowledge about Dimethyl Disulfide (CAS:624-92-0)

1.Chemical properties:

Light yellow transparent liquid. There is a foul odor. It is insoluble in water and can be mixed with ethanol, ether, and acetic acid.

2.Purpose:

Used as a passivating agent for solvents, catalysts, pesticide intermediates, coking inhibitors, etc. Dimethyl disulfide reacts with cresol to produce 2-methyl-4-hydroxy anisulfide, and then condenses with O, O-dimethyl phosphoryl sulfide chloride in the Chemicalbook alkaline medium to obtain Fenthion. This is an efficient and low toxicity organic phosphorus insecticide with excellent control effects on rice borers, soybean heartworms, and gadfly larvae. It can also be used as veterinary medicine to eliminate cowfly maggots and cow wall lice.

3.Production method:

Dimethyl disulfide is synthesized by Dimethyl sulfate method in industry.

Na2S+S → Na2S2Na2S2+(CH3) 2SO4 → CH3SSCH3+Na2SO4 Put the solid Sodium sulfide and water into the reaction kettle, heat them, control the temperature at 50~60 ℃ to dissolve the Sodium sulfide in the Chemicalbook, then add equimolar sulfur in batches, keep it warm for 1h, cool it to 45 ℃, start dropping Dimethyl sulfate, keep the reaction temperature at 40~45 ℃, and keep it warm for 1h after adding, the product Dimethyl disulfide can be steamed out. In addition, Dimethyl disulfide can also be synthesized by methyl mercaptan method.

4.Storage and transportation characteristics:

Ventilation and low-temperature drying of the warehouse; Store separately from oxidants and acids

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