Antimony trifluoride, also known as antimony(III) fluoride or Swart's reagent, is a chemical compound. Its chemical formula is SbF3. It has antimony and fluoride ions in it. The antimony is in its +3 oxidation state.
Antimony trifluoride is a light gray solid. It dissolves easily in water. It is very corrosive. It has a strong odor.
It is used to add fluoride ions to other chemical compounds in organic chemistry. A Belgian chemist reacted a chloride with antimony trifluoride and chlorine to make a fluoride from the chloride. It was used to make Freon. It is also used in pottery and dyeing.