<unk>  is a chemical compound with the chemical formula . This colorless gas or liquid is the principal industrial source of<unk> , often as an aqueous solution called hydrofluoric acid. It is an important feedstock in the preparation of many important compounds including pharmaceuticals and polymers, e.g. polytetrafluoroethylene (PTFE).<unk>  is widely used in the petrochemical industry as a component of superacids.<unk>  boils at near room temperature, much higher than other hydrogen halides.<unk>  is a highly dangerous gas, forming corrosive and penetrating hydrofluoric acid upon contact with moisture. The gas can also cause blindness by rapid destruction of the corneas.
Hydrogen fluoride
Vinyl chloride
Triphenylchloroethylene
Tetrachlorodecaoxide
Triphenylbromoethylene
Hydrogen selenide
Heptachlor
Bromine monochloride