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calcium hydrogen sulfite
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calcium hydrogen sulfite

chemical compound
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Quick Summary

Calcium hydrogen sulfite, also known as calcium bisulfite, has the chemical formula Ca(HSO3)2. It is typically found as a yellowish solution that often contains free sulfur dioxide. This compound is produced by reacting sulfur dioxide with limestone in the presence of water, or by reacting sulfur dioxide with calcium hydroxide.

Calcium bisulfite has several applications, including its use in the sulfite process for making wood pulp. It also serves as a disinfectant and an antichlor, a substance used to remove excess chlorine after bleaching.12

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