Hydroiodic acid

It is an aqueous solution of hydrogen iodide with the chemical formula HI(aq).

It is a strong acid, in which hydrogen iodide is ionized completely in an aqueous solution.

[2] Hydroiodic acid reacts with oxygen in air to give iodine: Like hydrogen halides, hydroiodic acid adds to alkenes to give alkyl iodides.

It can also be used as a reducing agent, for example in the reduction of aromatic nitro compounds to anilines.

[4][5] Hydroiodic acid is listed as a U.S. Federal DEA List I Chemical, owing to its use as a reducing agent related to the production of methamphetamine from ephedrine or pseudoephedrine (recovered from nasal decongestant pills).

Space-filling model of hydrogen iodide
Space-filling model of hydrogen iodide
Space-filling model of water
Space-filling model of water
The iodide anion
The iodide anion
Space-filling model of the hydronium cation
Space-filling model of the hydronium cation
NFPA 704 four-colored diamond Health 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gas Flammability 0: Will not burn. E.g. water Instability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogen Special hazard ACID: Acid
An oxidized solution of hydriodic acid.
The catalytic cycle of the Cativa process
The catalytic cycle of the Cativa process