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Sodium pyrosulfite

Molecular formula: Na2S2O5
Executive standard: industrial grade HG/T2826—2008, food grade GB1893—2008
Appearance: white or light yellow crystal powder
Packing: compound plastic woven bag with inner plastic film and net weight is 25kg or 50kg
Notes: the product should be stored in ventilated and dry warehouse
Uses: mordant, antichlor, decolorizer, preservative, waste water treating agent
Quality guarantee period: 6 months
Product technical index

 
Item

index

 

industrial grade

food grade

 

superior grade

top grade

 

main content(Na2S2O5),% ≥

96.5

95.0

96.5

iron(Fe),     %  ≤

0.005

0.010

0.003

clarity

pass testing

water insoluble,            % ≤

0.05

0.05

heavy metal(Pb),%  ≤

0.0005

arsenic content(As),   % ≤

0.0001

0.0001


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