Potassium iodide

Source: wikipedia.org

Potassium iodide is a white crystalline salt with chemical formula KI, used in photography and radiation treatment. It finds widespread application as an iodide source because it is less hygroscopic than sodium iodide, making it easier to work with. KI can turn yellow upon heating in air or upon standing in moist air for long periods, because of oxidation of the iodide to iodine.

 The name of indicators The Norm

Brand (analytical grade)

The Norm

Brand (h.)

1. Mass fraction of potassium iodide (KI), %, not less 99,00 99,00
2. Mass fraction of water-insoluble substances,%, not more 0,010 0,020
3. Mass fraction of total nitrogen (N),%, not more 0,001 0,002
4. Mass fraction of iodine and iodates (IO3), %, not more 0,005 0,005
5. Mass fraction of phosphates, %, not more 0,001 Not norm
6. Mass fraction of sulfates (SO4), %, not more 0,0050 0,0100
7. Mass fraction of chlorides and bromides, %, not more 0,03 0,01
8. Mass fraction of iron (Fe), %, not more 0,0003 0,0010
9. Mass fraction of barium, %, not more 0,004 Not norm
10. Mass fraction of calcium, %, not more 0,005 Not norm
11. Mass fraction of magnesium, %, not more 0,003 Not norm
12. Mass fraction of heavy metals, %, not more 0,0005 0,0010
13. Mass fraction of formylic acid 0,001 0,001
14. pH of a 5% solution of the drug 6-9 6-9