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CAS No.: 7681-57-4
Other Names: SMBS
MF: Na2S2O5
EINECS No.: 231-673-0
Place of Origin: China (Mainland)
Grade Standard: Food Grade,Industrial Grade
Purity: 64%
Appearance: White or light yellow crystal
Application: Coating Auxiliary Agents, Leather Auxiliary Agents, Rubber Auxiliary Agents, Textile Auxiliary Agents, Water Treatment Chemicals
Brand Name: EG
Model Number:
Sodium Metabisulfite 64%: CAS No.7681-57-4

Specifications

Product Description  
Sodium metabisulphite 

SMBS 
Another name: Sodium pyrosulfite 
Sodium metabisulphite 
Formula: Na2S2O5 
CAS No.: 7681-57-4 

Usage: Sodium metabisulphate (SMBS) is used as a food additive, leaching agent for textile fibres; 
Colors stripper and dechlorination; Preparation of Indigo Vat Dye; Solubilizing And acidyfing agent for leather industries; Bleaching agent 
 
No. Specifications Industrial Grade Food Grade
1 Na2S2O5%≥ 96.0 68.0
2 SO2%≥ 64.0 64.0
3 Iron(Fe)%≤ 0.005 0.005
4 Water insolubles%≤ 0.05 0.05
5 PH 4.0-4.6 4.0-4.6
6 Arsenic(As)%≤ 0.01 0.002%
7 Heavy metals, as Pb  %≤   0.002%