[pə′tas·ē·əm ′flu̇r‚īd] (inorganic chemistry) KF or KF·2H2O Poisonous, white, deliquescent crystals with saline taste; soluble in water and hydrofluoric acid, insoluble in alcohol; melts at 846°C; used to etch glass and as a preservative and insecticide.AcronymsSeeKFL