Vetyjodidihappo

Vetyjodidihappo, also known as hydroiodic acid, is a strong acid with the chemical formula HI. It is a colorless, highly corrosive liquid that is soluble in water. In aqueous solution, it dissociates completely into hydrogen ions (H+) and iodide ions (I-). This makes it a powerful proton donor.

Hydroiodic acid is a key reagent in organic synthesis, particularly in reactions involving the cleavage of ethers and alcohols. It is also used in the production of various iodide salts, which find applications in pharmaceuticals, photography, and as catalysts. In analytical chemistry, it can be used as a reducing agent.

The pure compound, HI, is unstable and can decompose into hydrogen gas and iodine vapor, especially when exposed to light or heat. Solutions of hydroiodic acid are more stable but can still oxidize over time, leading to the formation of iodine and water. This oxidation can be observed as a gradual yellowing or browning of the solution. Due to its corrosive nature, handling vetyjodidihappo requires appropriate safety precautions, including protective clothing and ventilation.