It is a colourless transparent or light yellow fuming, pungent odor liquid,can purify aluminium or uranium etch glass,cleaning Executive Standards ... , organic fluoridepurify aluminium and uranium dissolve oxidesetch glass, carve a design, mark scale and textremove the oxide from the surface ... organics, such as Teflon(polytetrafluoroethylene)and refrigerant Freon. electronic cleaning hydrofluoric Acid