Dimethyl disulfide CAS 624-92-0
Boiling point -85°C; Density 1.0625; Vapor density 3.24 (vs. air); Vapor pressure 22 mmHg (20°C); Refractive index n20/D 1.525 (lit.); Flash point 76°F; Storage conditions: Flammables area; Solubility 2.7 g/L; Form/Color: Clear liquid. It is used as a solvent, a passivating agent for catalysts, a pesticide intermediate, a coking inhibitor, and more. Dimethyl disulfide reacts with cresol to form 2-methyl-4-hydroxythioanisole, which then undergoes condensation with O,O-dimethyl phosphorochloridothioate in an alkaline medium to yield fenthion. Fenthion is a highly effective, low-toxicity organophosphorus insecticide that provides excellent control against rice stem borers, soybean pod borers, and cattle botfly larvae; it is also used in veterinary medicine to eliminate cattle grubs and cattle ticks. The product is obtained by the reaction of dimethyl sulfate with sodium disulfide. Sulfur powder is added to a sodium sulfide solution under stirring, and the mixture is heated to 80–90°C and