What is calcium hydrogen sulphite used for?

Calcium hydrogen sulfite, also known as calcium bisulfite, is primarily used as a preservative and antioxidant in the food industry, particularly in wine production to prevent oxidation and spoilage. It is also utilized in various industrial applications, such as water treatment and the production of paper and textiles, where it acts as a bleaching agent. Additionally, it can be employed in chemical synthesis and as a reducing agent in certain reactions.