CAS NO.: 7664-39-3 Molecular Formula: HF Molecular Weight: 20.01 Density: 0.98 Content: 40% to 55% Appearance: colorless and transparent liquid Nature: strong pungent odor, and a strong corrosive. Uses: used in the atomic energy industry, the system elements fluorine, fluoride can also be a catalyst, fluorinated agents used for the manufacture of organic or inorganic fluoride, but also for stainless steel, non-ferrous metal pickling, glass grinding and pickling , frosted lamp handling corrosive materials.