Calcium sulfite Chemical Properties

Melting point:

600°C

Density 

33.3[at 20℃]

solubility 

slightly soluble in ethanol; soluble in acid solutions

form 

solid (rough estimate)

color 

white

Water Solubility 

0.0043g/100mL (18°C), 0.001g/100mL (100°C) H2O; slightly soluble alcohol; soluble in acid solutions with SO2 evolution [MER06] [CRC10]

EPA Substance Registry System

Sulfurous acid, calcium salt (1:1) (10257-55-3)

Calcium sulfite Usage And Synthesis

Application

Calcium sulfite can remove residual chlorine from water, including combined residual chlorine (NH2Cl, NHCl2, and NCl3) and free residual chlorine (ClO-, HOCl, and Cl2). Compared with traditional activated carbon, it has a more efficient chlorine removal effect, is safer, more resistant to high temperatures, and does not breed bacteria. It is widely used in various water treatments for residual chlorine removal in Southeast Asian countries and regions such as Japan, South Korea, Malaysia, and Taiwan.

Chemical Properties

hexagonal; white crystal(s) or powder(s); slowly oxidizes in air to CaSO4; used in brewing, as a disinfectant in sugar manufacturing [HAW93] [MER06] [CRC10]

Calcium sulfite(10257-55-3)Related Product Information

• Ammonium sulfite monohydrate
• Ammonium Sulfite
• Iron hydroxide
• Calcium chloride hexahydrate
• Ammonium sulfate
• Copper(II) sulfate pentahydrate
• Calcium hydroxide
• Sulfur trioxide
• Sodium thiosulfate pentahydrate
• Sodium metabisulfite
• Sodium sulfite
• Ferrous sulfate
• Sulfurous Acid
• Calcium dithionite
• Calcium bisulfite
• CALCIUM SULFATE
• Calcium sulfate hemihydrate
• GLAUBERITE