Potassium persulfate

Potassium persulfate

Potassium persulfate is a chemical compound with the formula K2S2O8. Also known as potassium peroxydisulfate or KPS, it is a white, crystalline, odorless solid that is soluble in water. It is a strong oxidizer and is used in a variety of applications, including as a laboratory reagent, in the manufacture of polymers, and in the etching of printed circuit boards.

Chemical properties

Potassium persulfate is a strong oxidizer, with oxidation potential similar to that of hydrogen peroxide. It is stable under normal conditions, but can decompose explosively when heated or in the presence of reducing agents. The decomposition of potassium persulfate can be initiated by heat, light, mechanical shock, or catalytic substances.

Uses

Potassium persulfate is used in a variety of applications. In the laboratory, it is used as a reagent in the preparation of polymers and in the etching of printed circuit boards. It is also used in the bleaching of hair and textiles, in the desizing of fabrics, and in the decolorization and deodorization of oils.

In the field of polymer chemistry, potassium persulfate is used as an initiator for the polymerization of acrylamide and other monomers. It is also used in the synthesis of polyacrylamide gels, which are used in gel electrophoresis.

Safety

Potassium persulfate is a strong oxidizer and can cause fires if it comes into contact with combustible materials. It can also cause irritation to the eyes, skin, and respiratory tract. Prolonged exposure can lead to allergic reactions.

See also

• Ammonium persulfate
• Sodium persulfate