Potassium selenocyanate (KSeCN) is an inorganic compound composed of selenium, cyanide, and potassium ions. It is a white or yellowish solid that is soluble in water.

1. Organic synthesis: Potassium selenocyanate is used as a selenidizing agent in organic chemistry for the introduction of selenium atoms into organic molecules, especially in the reaction of forming carbon-selenium bonds. It can be used in the synthesis of various organic selenium compounds, which have important applications in medicinal chemistry, materials science, and biochemistry.

2. Coordination chemistry: Selenocyanate ion is a strong ligand that can form stable complexes with a variety of metal ions. These complexes have potential applications in areas such as catalysis, electronic materials, and molecular identification.

3. Analytical chemistry: Potassium selenocyanate can be used for the quantitative analysis of selenium, by reacting with certain metal ions to form colored precipitates, so as to perform spectroscopic analysis or titration.

4. Materials Science: Potassium selenate is used in the synthesis of selenium-containing compounds, which may have special electrical, optical, or magnetic properties that are suitable for the development of novel materials.

5. Biological research: In biological research, potassium selenocyanate may be used to synthesize biologically relevant selenium compounds to study the role and metabolism of selenium in living organisms.