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Sodium Metabisulphite

Sodium Metabisulfite

Sodium Metabisulphite

Name: Sodium Metabisulphite

Molecular formula: Na2S2O5

CAS:7681-57-4

Molecular weight: 190.10

Synonmys:Sodium pyrosulfite; disodium disulphite; sodium pyrosulphite;disodium oxidosulfanesulfonate oxide; sodium Metabisulfite

Sodium Metabisulfite Property:

White or slightly yellow crystalline powder. Soluble in water, acidic aqueous solution. Soluble in glycerol, slightly soluble in ethanol. Easily decompose when sodium metabisulfite becomes wet , When exposed in air it will easily oxidize into sulfate. Emit sulfur dioxide and generate the corresponding salts when sodium metabisulphite contacts with acid. Sodium metabisulfite will decompose when heated to 150 ℃.

Sodium Metabisulphite can be divided into third categories according to its use:sodium metabisulfite food grade and sodium metabisulfite technology grade .

Test Items

Quality standards

Sodium metabisulphite 96.5%

Sodium metabisulphite 97%

Content(as Na2S2O5), %

96.5 min

97 min

Content(as SO2), %

65.0 min

65.0 min

Iron (Fe), %   

0.003 max

0.003 max

Clarity, %

A little turbid

A little turbid

Heavy metal( as Pb), %

 

0.0005 max

Arsenic(As), %

 

0.0001 max

PH value

4.0-4.6

4.0-4.6


Sodium Metabisulfide Use:
Sodium  Metabisulphite in Food
Bleaching agent(such as candy, cakes, dried slices of tender bamboo shoots etc.);
Loosening agent(such as bread, biscuits etc.)preservative,disinfector(such as jam and can etc.);
Antioxidant, antistaling agent(such as seafood, fruits, vegetables etc.);
Packaging: Packed in polypropylene bag lined with polyethylene bag;
Sodium  Metabisulphite in Industry
Dye printing mordant;
Textile antichlor after being bleached;
Reducing agent and sulfonating agent for chemical and medical use;
Bamboo, wood, paper fiber bleaching agent, non-ferrous metal ore dressing agent, waste water treating , rubber freezing agent;

 

Packing: Packed in polypropylene bag lined with polyethylene bag.

Net wt: 25, 50, 1000Kg/bag.