Sodium metabisulfite is a white crystalline or powder solid
Uses
*Food additive
It is used as a preservative and antioxidant in food and is also known as E223.
Sanitization and cleaning agent
It is commonly used in home brewing and winemaking to sanitize equipment.
It is used as a cleaning agent for potable water reverse osmosis membranes in desalination systems.
It is also used to remove chloramine from drinking water after treatment.