20621-29-8

This product is liquid, bp30 ℃, volatile at room temperature, soluble in inert organic solvent, and decomposes in contact with water.

Trifluoromethyl sulfinyl chloride is an intermediate for the insecticide fipronil.

The preparation method of Trifluoromethyl sulfinyl chloride is that CF₃Cl is reacted with sodium dithionite to generate sodium trifluoromethyl sulfite, and then reacted with thionyl chloride to generate a product. Reaction equation: CF₃Cl1+Na₂S₂O₄→CF₃SO₂Na[SOCl₂]→CF₃SOCl
It can also be reacted with potassium trifluoroacetate and sulfur dioxide in a solvent to generate Potassium trifluoromethyl sulfoxide, and then react with thionyl chloride to produce the product. Reaction equation: CF₃COOK+SO₂→CF₃SO₂K→CF_{3< /SUB>SOCl}