IUPAC Name
Potassium iodide
Cas Number
7681-11-0
HS Code
28276010
Formula
KI
Industry
-
Appearance
White Solid
Common Names
Pima; Kali iodide; Thyro-Block
Packaging
25kg /bag
Brief Overview
Potassium Iodide exist as colourless or white cubic crystals or granules and becomes yellowish when exposed to bright light due to photochemical decomposition to liberate traces of free iodine.
Manufacturing Process
Method 1:
Step 1: Potassium iodide is made by absorption of iodine in potassium hydroxide:
Step 2: Potassium iodate, KIO3 is then separated from the product mixture by crystallization and filtration. The remaining iodates are removed by evaporation of the solution and other processes, such as carbon reduction or thermal decomposition at 600ºC to iodide:
2KIO3 → 2KI + 3O2
Method 2: Treat iron turnings with iodine solution. The product, Fe3I8•16H2O, is boiled with 15 wt% potassium carbonate solution according to the equation below:
Fe3I8•16H2O + 4K2CO3 → 8 KI + 4CO2 + Fe3O4 + 16H2O
Method 3: Potassium iodide can be prepared by reacting hydriodic acid with potassium bicarbonate according to the equation below:
HI + KHCO3 → KI + CO2 + H2O
Agriculture Industry: Used as a fungicide
Medical Industry: