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- Details for Sodium metabisulfite
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Sodium metabisulfite 7681-57-4
Category : Inorganic chemicals
CAS NO : 7681-57-4 EC NO : 231-673-0 MF : Na2S2O5 MW : 190.1065 Product description : 
Molecular Formula : Na2S2O5
Molecule Weight : 190.12
CAS NO .: 7681-57-4.
Property: white or light yellow crystal powder, a strong smell of sulfur dioxide,relative density is 1.4, easy to dissolve in water and glycerin, water solution. It has acidity,and its solubility will become large while raising the temperature and is less to dissolve in ethanol.
Packaging: 25kg plastic woven bag, 25kg kraft paper bag, 25kg polyethylene plastic bag, 500kg/1000kg/1100kg/1200kg container bag or customized according to customer requirements.
Specification For Food Grade and Industry Grade :
ITEM Quality Index Food Grade Industry Grade Purity ( As Na2S2O5) ≥98.0% ≥96.0% Sulfur Dioxide( SO2) ≥65.0% ≥65.0% Arsenic ( As ) ≤0.0002% - Heavy metals ( As Pb ) ≤0.0005% - Selenium (Se ) ≤0.0005% - Iron (Fe) ≤0.001% ≤0.002% Water insoluble ≤0.02% ≤0.05% PH value 4.0-4.8 4.0-4.8 Remark Conformed with FCC V and E 223 Standard Purpose:
(1) Food grade: bleach (such as candy, cakes, magnolia chips, etc.); Loosening agent (such as bread, biscuit, etc.); Antiseptic and fungicide (such as juice, canned food, brewing, food storage, etc.); Anti-oxygen preservatives (such as golden needle buds, seafood, fruits and vegetables, etc.)
(2) Industrial grade: printing and dyeing mordant; Dechlorination agent after fabric bleaching; Chemical and pharmaceutical reducing agents and sulfonating agents; Bamboo, wood and paper fiber bleach; Non-ferrous metal dressing agent; Waste water treatment agent; Rubber coagulant; Aromatic industry used as hydrocarbon aromatic aldehyde; Used in leather industry as depilator, softener and wear-resistant; The photosensitive industry is used as the reducing agent of the developer and the protective agent of the fixing solution.
Synonyms : Sodium pyrosulfite;disodium disulphite;Sodium metabisulphite;Sodium disulphite;Sodium pyrosulphite;SODIUM DISULFITE;disodium oxidosulfanesulfonate oxide;Sodium Metabi;Metabisulfite Sodium;Sodium Metabisulfite (Food Grade); Molecular Structure : 
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Sodium metabisulfite