Calcium bisulfite

Calcium bisulfite (CAS 13780-03-5), also known by its food additive designation E227, is an inorganic sulfite salt supplied primarily as an aqueous solution. It functions as a preservative, antioxidant, and bleaching agent across food processing, pulp manufacturing, and water treatment operations. In food and beverage production, this additive controls microbial growth and oxidative browning in products such as wines, fruit juices, and dried fruits where sulfite preservation is required. It is essential for maintaining the shelf life and color stability of sensitive food products.

Pulp and paper manufacturers use this chemical as the active cooking liquor component in the sulfite pulping process. In this application, it breaks down lignin to liberate cellulose fibers for paper production, ensuring high-quality output for industrial use. In water treatment, it serves as a dechlorination agent, neutralizing residual chlorine in municipal and industrial effluent streams before discharge. This process is vital for environmental safety and meeting regulatory standards for wastewater management.

It also acts as a bleaching agent in the treatment of wood pulp, improving brightness without the harsher conditions required by chlorine-based alternatives. This makes it a preferred choice for manufacturers seeking efficient and controlled bleaching processes. The product is commercially supplied as an aqueous solution, typically in concentrations ranging from 6% to 15% active SO₂ equivalent. Food-grade material is available to the required specification for use within permitted additive limits for global distribution.

Technical-grade solution is standard for pulp, paper, and water treatment applications where high purity is necessary for industrial performance. Our supply chain ensures consistent quality and reliable delivery for all large-scale manufacturing requirements.