氢氟酸 Traditional form: 氫氟酸 Pinyin (reading): qīngfúsuān Definitions: hydrofluoric acid HF Characters: 氢 - ammonia 氟 - fluorine 酸 - tart, sour; spoiled; acid Traditional characters: 氫 - ammonia 氟 - fluorine 酸 - tart, sour; spoiled; acid