Triethylamine trishydrofluoride is a highly versatile fluorinating agent without the disadvantages of liquid hydrogen fluoride or other mixtures of HF with bases. The main types of fluorination using this reagent are reviewed: Nucleophilic substitutions, reactions using this reagent as nucleophilic partner in electrophilic additions, electrofluorinations and deprotection of silylethers. Johann Ambrosius Barth 1996.