Specification:
|
specifications
|
Tech Grade
|
Food Grade
|
|
Sodium Metabisulphite (As SO2), % ≥
|
64
|
64
|
|
Fe , % ≤
|
0.005
|
0.005
|
|
Water-insoluble Matter, % ≤
|
0.05
|
0.05
|
|
PH
|
4.0-4.6
|
4.0-4.6
|
|
Pb, % ≤
|
---
|
0.002
|
|
As,% ≤
|
---
|
0.0002
|
Usage: Rubber industry used as coagulant. Cotton printing and dyeing industry as a bleaching agent after the dechlorination, cotton scouring agent. Leather industry for leather processing, make leather soft, plump, tough, with a waterproof, bending, wear properties.