| Identification | Back Directory | [Name]
Calcium sulfite | [CAS]
10257-55-3 | [Synonyms]
Calciumsulfit
calcium sulphite
CalciumSulfitePowder
Sulfurous acid, calcium salt
sulfurous acid, calcium salt (1:1) | [EINECS(EC#)]
233-596-8 | [Molecular Formula]
CaO4S | [MOL File]
10257-55-3.mol | [Molecular Weight]
136.141 |
| Chemical Properties | Back Directory | [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) |
| Hazard Information | Back Directory | [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] |
| Questions And Answer | Back Directory | [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. |
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