Persulfuric acid

Persulfuric Acid (also known as Peroxymonosulfuric Acid, Caro's Acid, or Permonosulfuric Acid) is a strong oxidizing agent and is one of the most powerful oxidizers known. It is a compound with the molecular formula H2SO5 and is an isomer of H2S2O8, known as peroxydisulfuric acid.

History

Persulfuric Acid was first prepared in 1898 by a German chemist, Heinrich Caro, hence the name Caro's Acid. It was initially used in the textile industry for bleaching purposes.

Properties

Persulfuric Acid is a colorless liquid at room temperature. It is highly reactive and unstable, decomposing into sulfuric acid and oxygen when heated. It is a strong oxidizing agent, capable of oxidizing most organic compounds.

Preparation

Persulfuric Acid can be prepared by the reaction of hydrogen peroxide and sulfuric acid, a process that is highly exothermic. The reaction is typically carried out in a cooled environment to control the reaction rate and prevent decomposition.

Uses

Persulfuric Acid is used in a variety of applications, including as a laboratory reagent, in the synthesis of caprolactam (a precursor to Nylon 6), and in the etching of printed circuit boards. It is also used in the bleaching of textiles and paper pulp, and in the oxidation of sulfur dyes.

Safety

Due to its strong oxidizing properties, Persulfuric Acid can be hazardous. It can cause severe burns and eye damage, and its vapors can cause respiratory irritation. It should be handled with care, using appropriate personal protective equipment.

See Also

• Sulfuric Acid
• Hydrogen Peroxide
• Oxidizing Agent
• Heinrich Caro