Name：Sodium Metabisulphite
Chemical formula：Na2S2O5
Physical appearance：White powder or small crystalline particles.
Application:
1>Bleaching agent for textile fibres;
2>Colors stripper and dechlorination;
3>Preparation of Indigo Vat Dye;
4>Solubilizing and acidifyfing agent for leather industries ;
5>Bleaching agent for paper pulps;
6>Preservative and sterilisation agent for food industries.
Product Specification:
TECH GRADE
FOOD GRADE
NA2S2O5
>96.5%
>97.0%
SO2
>65%
>65%
FE
<0.005%
<0.005%
WATER INSOLUBLE
<0.05%
<0.05%
HEAVY METAL(PB)
<0.001%
<0.001%
AS
<0.0003%
<0.0001%
PH
4-4.5
4-4.5
