Английская Википедия:Hydroiodic acid

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Шаблон:Short description

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Hydroiodic acid (or hydriodic acid) is a colorless and aqueous solution of hydrogen iodide (HI). It is a strong acid, which is ionized completely in an aqueous solution. Concentrated solutions of hydroiodic acid are usually 48% to 57% HI.[1]

Файл:Oxidized Hydriodic Acid.jpg
An oxidized solution of hydriodic acid.

Reactions

Hydroiodic acid reacts with oxygen in air to give iodine:

4 HI + O2 → 2 Шаблон:Chem + 2 I2

Like other 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.[2]

Cativa process

The Cativa process is a major end use of hydroiodic acid, which serves as a co-catalyst for the production of acetic acid by the carbonylation of methanol.[3][4]

The catalytic cycle of the Cativa process
The catalytic cycle of the Cativa process

Illicit uses

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).[5]

References

Шаблон:Reflist

External links

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nl:Waterstofjodide pl:Kwas jodowodorowy