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Sodium Metabisulfite

 

 

Basic information:

CAS NO.7681-57-4
UN No.2693
Chemical formula:Na2S2O5 
Molecular weight:190.10
Character:white or yellow crystalline powder or small crystals
Dennsity:1.48g/cm3
Melting point:170(150 start to decompose)
Solubleness:soluble in water, water solution is acidic(54g/100ml water at 20;81.7g/100ml water at 100). Soluble in glycerol,slightly soluble in ethanol.

 

Technical Index(Mass fraction/%)

Items

Index

   Sulfur dioxide(%)

≥ 65

    Iron(%)

≤ 0.005

     water insoluble(%)

≤ 0.05

  PH value

4.0-4.6

 

Uses:

 Used in printing and dyeing, organic synthesis,printing,leather,pharmaceutical And other departments;in food processing as preservatives,bleach,osteoporosis Agent.

 

Package/Capacity of container/Storage:

Packing:in 25kg/50kg bag.

Store in cool,dry and ventilated warehouse.

 

 

 

 

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