Potassium sulfite

E 225

White solid

Fixed

~ 2.5 g · cm -3

Decomposition

Soluble in water

Template: Infobox chemical / molecular formula search is not possible

Potassium sulfite is a chemical compound that is used as a reducing agent in the chemical industry, especially in the photographic industry.

Occurrence

Potassium sulfite is formed in the combustion of black powder.

Sulfites generally arise from the reaction of sulfur dioxide with water in the following two steps:

To generate potassium in this way a potassium carbonate solution was added with sulfur dioxide and later added another potassium carbonate.

Upon reaction of sulfurous acid with potassium hydroxide:

Potassium sulfite is a potassium salt of sulfurous acid.

Potassium sulfite is used as a constituent of photographic chemicals ( developer solution ).

323541