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Sodium hydrosulfite

Molecular formula: Na2S2O4
Executive standard:
Industrial grade: HG/T 2074-2011
Food grade: GB 22215-2008   HG/T 2074-2011
Packing:
1)iron drum in seal with inner double layer plastic film and net weight is 20kg,40kg
2)domestic recoverable package and net weight is 1200kg;
Notes: it should be stored in cool, dry and ventilated warehouse; please keep away from fire, heat and direct sunlight.
Uses: textile reducing agent, printing assistant, decolorizer andcleaning agent; mechanical pulp in paper making industry; food food preservative and so on

HG/T 2074-2011 product technical index:

Item

index

superior grade

top grade

qualified product

sodium hydrosulfite(Na2S2O4 ),%  ≥

90.0

88.0

85.0

Appearance

white crystal powder

smell

no smell or light sulfur dioxide smell

solubility

soluble in neutral formaldehyde solution

GB 22215-2008 product technical index :

Item

index

sodium hydrosulfite(Na2S2O4 ),% ≥

88.0

charity

pass testing

heavy metal(Pb) ,%  ≤

0.0010

lead(Pb) ,%,≤

0.0005

cadmium(Cd),%,≤

0.0002

arsenic(As) ,%,≤

0.0001

Ethylene Diamine Tetraacetic Acid(EDTA)

qualified

formate(HCOONa),    %  ≤

0.050


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