hydriodic acid
/ˌhʌɪdrɪˈɒdɪk
/ /-ʌɪˈɒdɪk/noun [mass noun] Chemistry
A strongly acidic solution of the gas hydrogen iodide in water.
- Chemical formula: HI.
- The principal chemicals are ephedrine or pseudoephedrine, hydriodic acid, and red phosphorus.
- In this way, by adding phosphorus to the reaction mixture, hydrogen iodide is recycled and the reducing efficiency of hydriodic acid is enhanced.
Origin
Early 19th century: hydriodic from a blend of hydrogen and iodine.