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Potassium iodide

Potassium iodide in Tradeasia

IUPAC Name

Potassium iodide

Cas Number

7681-11-0

HS Code

28276010

Formula

KI

Industry

-

Basic Info

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:

  • Used as a nutritional supplement in animal feeds and food additives for human consumption.
  • Used in nuclear medicine scintigraphy for thyroid protection.

 

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