Sodium Metabisulfite
Chemical Name: Sodium Metabisulfite
MFC:Na2S2O5
CAS NO: 761-55-4
HS CODE: 2832100000
|
Main content(Na2S2O5) |
98.2% |
|
Fe %( Fe) |
0.003% |
|
Water-Insoluble |
0.02% |
|
Arsenic(As) content |
<0.0001 |
Package: 25kg/50kg/1000kg
Sodium metabisulfite, also known as sodium pyrosulfite or disodium metabisulfite, is a white compound with the chemical formula Na2S2O5. It is an inorganic salt that is commonly used as a food preservative, antioxidant, and reducing agent in various industries.
Sodium metabisulfite is produced by heating sodium bisulfite solution to around 150-180°C. It is soluble in water and has a slightly acidic taste. It is commonly available in the form of a fine white powder or granules.
Uses of Sodium Metabisulfite:
1. Food preservation: Sodium metabisulfite is commonly used in food processing and preservation as a preservative and antioxidant. It inhibits the growth of bacteria, yeasts, and molds and also helps to maintain the color and texture of the food.
2. Brewing and winemaking: Sodium metabisulfite is used as a sterilizing agent in brewing and winemaking. It is also used as a preservative to prevent oxidation and bacterial contamination in beer and wine.
3. Water treatment: Sodium metabisulfite is used as a reducing agent in water treatment to remove chlorine and other chemicals from drinking water. It is also used to prevent pipe corrosion.
4. Photography: Sodium metabisulfite is used in photography as a reducing agent for developing film and to remove unexposed silver halides from photographic prints.
5. Textile and leather industries: Sodium metabisulfite is used as a reducing agent for the dyeing and printing of textiles and leather products.
Safety Precautions:
Sodium metabisulfite should be handled with care as it is a toxic and irritant substance. It can cause skin and eye irritation, respiratory problems, and allergic reactions. It should be stored in a cool and dry place away from direct sunlight and moisture. It should not be mixed with acids, as this can release toxic sulfur dioxide gas. The use of adequate protective measures such as gloves, goggles, and masks is recommended when handling sodium metabisulfite.