Description

Calcium Sulfite is an inorganic chemical compound with the formula CaSO3. It serves as a crucial intermediate and functional additive in various industrial processes, valued for its reducing and preservative properties. This product is essential for manufacturers in sectors such as water treatment, food processing, and pulp & paper production, where it acts as an oxygen scavenger and bleaching agent.

Application

• Water Treatment: Used as an oxygen scavenger and dechlorination agent in boiler feed water and wastewater treatment systems.
• Food Industry: Employed as a preservative (E226) and antioxidant to prevent spoilage and maintain color in certain food products and beverages.
• Pulp & Paper Manufacturing: Acts as a bleaching agent and a sulfur source in chemical pulping processes.
• Flue Gas Desulfurization (FGD): An intermediate in certain wet scrubbing processes for removing sulfur dioxide (SO2) from industrial exhaust gases.
• Chemical Synthesis: Serves as a precursor and reducing agent in the production of other sulfur-containing chemicals.
• Photography: Historically used in developing solutions.

Basic Information

Product Name	Calcium Sulfite
CAS No.	15091-91-5
Molecular Formula	CaSO3
Molecular Weight	120.14 g/mol
Synonyms	Sulfurous acid, calcium salt (1:1); Calcium sulphite; E226; Preservative E226; Kalziumsulfit (German); Sulfite de calcium (French); Caswell No. 154
EINECS	239-164-3

Quality Control

Our Calcium Sulfite is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, composition, and physical properties. Certificates of Analysis (COA) documenting these results are provided to guarantee traceability and consistency for your industrial applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials. Due to its property of being easily oxidized, it is recommended to store under an inert atmosphere (e.g., nitrogen) for long-term stability. Keep container tightly sealed when not in use to minimize exposure to air and moisture.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (as CaSO3)	≥ 90.0 %
Calcium Content (as Ca)	Contact for details
Sulfite Content (as SO3)	Contact for details
Loss on Drying	≤ 2.0 %
Heavy Metals (as Pb)	≤ 20 ppm
Arsenic (As)	≤ 3 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.