HF is a common raw material for a great variety of industrial products. The global production capacity is over three million metric tonnes. Hydrogen fluoride is used to make refrigerants, herbicides, pharmaceuticals, high-octane gasoline, aluminium (in smelters and refineries), plastics, electrical components (in clean rooms), and fluorescent light bulbs. Sixty percent of the hydrogen fluoride used in manufacturing is for processes to make refrigerants. HF is also used for etching glass and metal.