Calcium sulfite

Calcium Sulfite is a chemical compound with the formula CaSO3. It is a byproduct of flue-gas desulfurization, a process of removing sulfur dioxide from exhaust flue gases of fossil-fuel power plants, and from the emissions of other sulfur-oxide emitting processes.

Chemical Properties[edit | edit source]

Calcium sulfite is a white crystalline powder. It is soluble in water but insoluble in alcohol. When exposed to air, it oxidizes to calcium sulfate.

Production[edit | edit source]

Calcium sulfite is produced industrially by the reaction of calcium oxide with sulfur dioxide in a controlled environment. The reaction is highly exothermic and releases a significant amount of heat.

Uses[edit | edit source]

Calcium sulfite has several uses in various industries. It is used in the paper industry as a filler and in the food industry as a preservative and antioxidant. It is also used in the production of glass and ceramics.

Health Effects[edit | edit source]

Exposure to calcium sulfite can cause irritation to the eyes, skin, and respiratory tract. Ingestion can lead to gastrointestinal disturbances.

Environmental Impact[edit | edit source]

Calcium sulfite can have a significant environmental impact. It can contribute to acid rain when it reacts with water and oxygen in the atmosphere to form sulfuric acid.

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