Calcium sulfite
- CAS No.
- 10257-55-3
- Chemical Name:
- Calcium sulfite
- Synonyms
- Calciumsulfit;calcium sulphite;CalciumSulfitePowder;Sulfurous acid, calcium salt;sulfurous acid, calcium salt (1:1)
- CBNumber:
- CB5874682
- Molecular Formula:
- CaH4O3S
- Molecular Weight:
- 124.17
- MDL Number:
- MOL File:
- 10257-55-3.mol
- MSDS File:
- SDS
| 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] |
| FDA UNII | 7078964UQP |
| EPA Substance Registry System | Sulfurous acid, calcium salt (1:1) (10257-55-3) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS07 |
|---|---|
| Signal word | Warning |
| Hazard statements | H302-H315-H319-H335 |
| Precautionary statements | P261-P302+P352-P305+P351+P338 |
| TSCA | TSCA listed |
| REACH Registrations | Active |
Calcium sulfite price
| Manufacturer | Product number | Product description | CAS number | Packaging | Price | Updated | Buy |
|---|---|---|---|---|---|---|---|
| Biosynth | KAA25755 | Calcium sulfite | 10257-55-3 | 5g | $150 | 2026-06-04 | Buy |
| Biosynth | KAA25755 | Calcium sulfite | 10257-55-3 | 10g | $154.2 | 2026-06-04 | Buy |
| Biosynth | KAA25755 | Calcium sulfite | 10257-55-3 | 25g | $308.5 | 2026-06-04 | Buy |
| aablocks | AA0007OD | Calciumsulfite 90% | 10257-55-3 | 5g | $18 | 2026-05-25 | Buy |
| aablocks | AA0007OD | Calciumsulfite ≥90% | 10257-55-3 | 500g | $21 | 2026-05-25 | Buy |
Calcium sulfite Chemical Properties, Uses, Production
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 Preparation Products And Raw materials
Raw materials
Preparation Products
| Supplier | Tel | Country | ProdList | Advantage | |
|---|---|---|---|---|---|
| Beijing HwrkChemical Technology Co., Ltd | 89508211 18501085097 | sales.bj@hwrkchemical.com | China | 9409 | 55 |
| Adamas Reagent, Ltd. | 4006009262 13023226327 | hmj@titansci.com | China | 14098 | 59 |
| Shandong Xiya Chemical Co., Ltd | 13355009207 13355009207 | 3007715519@qq.com | China | 18722 | 57 |
| Sichuan Kulinan Technology Co., Ltd | 400-1166-196 18981987031 | cdhxsj@163.com | China | 11674 | 57 |
| Maya High Purity Chemicals | +86 (573) 82222445 (0)18006601000 452520369 | sales@maya-r.com | China | 11693 | 57 |
| Shanghai Aladdin Bio-Chem Technology Co.,LTD | 400-6206333 13167063860 | anhua.mao@aladdin-e.com | China | 29977 | 65 |
| The future of Shanghai Industrial Co., Ltd. | 021-61552785 | sales@shshiji.com | China | 9531 | 55 |
| Shanghai JONLN Reagent Co., Ltd. | 400-0066400 13621662912 | 422131432@qq.com | China | 9970 | 55 |
| Huainan Kedi Chemical Factory | 0554-2106669 | sales1@kedichem.com | China | 4914 | 55 |
| Chengdu HuaXia Chemical Reagent Co. Ltd | 400-1166-196 13458535857 | cdhxsj@163.com | China | 13323 | 58 |
View Latest Price from Calcium sulfite manufacturers
| Image | Update time | Product | Price | Min. Order | Purity | Supply Ability | Manufacturer | |
|---|---|---|---|---|---|---|---|---|
 |
2026-05-28 | Calcium sulfite
10257-55-3
|
$19.60 | 1KG | 99% | 5000kg | Hebei Chuanghai Biotechnology Co,.LTD | |
 |
2026-03-20 | Calcium sulfite
10257-55-3
|
$1.00 | 1PCS | 99% | 10 mt | Hebei Chuanghai Biotechnology Co., Ltd | |
 |
2025-04-15 | Calcium sulfite
10257-55-3
|
$10.00 | 1kg | 99% | 20ton | Hebei Zhuanglai Chemical Trading Co.,Ltd |
-
- Calcium sulfite
10257-55-3
- $19.60
- 99%
- Hebei Chuanghai Biotechnology Co,.LTD
-
- Calcium sulfite
10257-55-3
- $1.00
- 99%
- Hebei Chuanghai Biotechnology Co., Ltd
-
- Calcium sulfite
10257-55-3
- $10.00
- 99%
- Hebei Zhuanglai Chemical Trading Co.,Ltd
