What is Potassium Iodide?

White cubic crystal or powder. It is slightly hygroscopic in humid air, free iodine is precipitated for a long time and turns yellow, and trace iodate can be formed. Light and humidity can accelerate decomposition. 1 g is dissolved in 0.7 ml of water, 0.5 ml of boiling water, 22 ml of ethanol, 8 ml of boiling ethanol, 51 ml of anhydrous ethanol, 8 ml of methanol, 7.5 ml of acetone, 2 ml of glycerin, and about 2.5 ml of ethylene glycol. Its aqueous solution is neutral or slightly alkaline and can dissolve iodine. Its aqueous solution will also oxidize and become yellow, which can be prevented by adding a small amount of alkali. The relative density is 3.12. Melting point is 680 ° C. The boiling point is 1330 ° C. Approximate lethal dose (rat, vein) 285mg / kg. It is widely used in the preparation of titration solutions in volume analysis iodometric method. Haploids were formulated with mediums such as Burreds, Improved White, MS, and RM. Stool test etc. Take pictures. Pharmaceutical. If there is insolubility or temperature in the experiment, please adjust it appropriately.

English name: POTASSIUM IODIDE

CAS number: 7681-11-0

EINECS number: 231-59-4

Chemical formula: KI

1. Potassium iodide is often used as a corrosion inhibitor for steel pickling or other synergists. Potassium iodide is the raw material for preparing iodides and dyes. It is used as a photographic emulsifier, food additive, as an expectorant, diuretic in medicine, as a medicine for the prevention and treatment of goiter and hyperthyroidism. It is used as a photo emulsifier in the photography industry, and also used as a medicine and food additive.

2. Used as a feed additive. As a component of thyroxine, iodine is involved in the metabolism of all substances in livestock and poultry and maintains heat balance in the body. Iodine is an essential hormone for the growth, reproduction and lactation of livestock and poultry, which can improve the growth performance of livestock and poultry and promote the health of the body. If the iodine deficiency of the livestock and poultry body, it will lead to metabolic disorders, body disorders, goiter, affect nerve function and digestion and absorption by hair color and feed, and eventually lead to slow growth and development.

3. The food industry is used as a nutritional supplement (iodine fortifier). It can also be used as a feed additive.

4. Used as analytical reagents, such as the preparation of iodine standard solution as auxiliary reagents. It is also used as a photo emulsifier and feed additive. Used in the pharmaceutical industry.

5. Potassium iodide is a co-solvent for iodine and some insoluble metal iodides.

6. Potassium iodide has two main uses in surface treatment: first, it is used for chemical analysis, using the intermediate reduction of iodide ions and some oxidizing ions to generate elemental iodine, and then the determination of iodine to calculate The concentration of the measured substance; the second is for the complexation of certain metal ions, and its typical use is as a complexing agent of cuprous and silver in electroplated copper-silver alloy.

7. The so-called iodine we often eat

1 Reduction method

Tested according to the analysis method specified in GB1272-88.

Method name:

Potassium iodideDetermination of potassium iodide

product:

Pour the potassium iodide solution into two beakers and make iodine solution after 1-2 hours of electrolysis. If you want to be more pure, electrolyze for another 2-3 hours to increase the purity. (The generated iodine solution is at the negative electrode) ^[2]

S24 / 25Avoid contact with skin and eyes.

Avoid contact with skin and eyes. ^[2]