Sodium metabisulfite is a crystallized powder of sulfur dioxide. Various methods have been proposed for the production of sodium metabisulfite. This compound can be produced by evaporating a sodium sulfite solution saturated with sulfur dioxide gas. The newest method of producing sodium metabisulfite in the world is the use of the wet gas process. In this process, the highest efficiency is achieved in terms of quantity and quality due to the direct contact of the gas with the substrate and under special conditions.
Technical Characteristics
| Chemical Formula | Na2S2O5 |
| Other names | Sodium pyrosulfite Sodium disulfite |
| CAS Number | 7681-57-4 |
| Molecular mass | 190.107 g/mol |
| Melting Point | 170 °C |
| Density | 1.48 g/cm3 |
| Appearance | White to yellow powder |
Applications
- Water and sewage treatment
- Textile and dye industry
- Pulp and Paper industry
- Food industries
- Plastic industries
- Construction industry
- Photography industry
Environmental impact of Sodium metabisulphite
Sodium metabisulphite can be harmful to the environment, especially if it enters water sources. It can damage aquatic ecosystems and reduce water quality. If released into the environment, it can cause irritation and harm to living organisms such as fish and therefore requires careful management during its use and disposal.
Safety Measures and Regulations for Handling Sodium metabisulphite
Chemical-resistant gloves, safety glasses and protective clothing should be worn when working with sodium metabisulphite. This chemical should be stored in dry, cool places and in resistant containers. In case of contact with skin or eyes, it should be washed immediately with water and if swallowed, a doctor should be consulted immediately.
Packing
Sodium metabisulfite can be supplied in 25 kg bags.