氰酸 Traditional form: 氰酸 Pinyin (reading): qíngsuān Definitions: cyanic acid HCN Characters: 氰 - cyanogen; ethane dinitrile 酸 - tart, sour; spoiled; acid Traditional characters: 氰 - cyanogen; ethane dinitrile 酸 - tart, sour; spoiled; acid