Chemical Formula: NA2SO3
|
TESTING ITEMS
|
STANDARD
|
|
SODIUM METABISULPHITE≥
|
96
|
|
SO2≥
|
64
|
|
PH
|
4.0-4.6
|
|
ARSENIC(AS)%≤
|
0.01
|
|
INSOLUBLE%≤
|
0.05
|
|
IRON≤
|
0.005
|
used as a reducing agent, the rubber peptizer, also used in the organic synthesis,the drugs manufacture and spices