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Shanghai Jiading Malu Chemical Co., Ltd.
Shanghai Jiading Malu Chemical Co., Ltd.
70 YRS
Shanghai, China
Main Products:
Sodium Bisulfite / Sodium Metabisulfite
Shanghai, China
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Sodium Metabisulfite / CAS 7681-57-4
OVERVIEW
Packaging
50 KG/Woven Bag
Lead Time
14-30 days
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DESCRIPTION
Sodium Metabisulfite
English Name: Sodium metabisulfite
CAS NO: 7681-57-4
Molecular Weight: 190.1065
EC NO: 231-673-0
Molecular Formula: Na2S2O5
InChI: InChI=1/2Na.H2O5S2/c;;1-6(2)7(3,4)5/h;;(H,1,2)(H,3,4,5)/q2*+1;/p-2
Standard: Reagent grade
Product Description:
Property: White or yellow crystalline powder or small crystal with strong SO2 odor, specific weight is 1.4, soluble in water, its aqueous solution presents acid, gives out SO2 and generates relevant salts in contact with strong acid.
Structural Formula: 
Typical Properties
Summary
It is used as preservative, bleach and loosening agent in food processing. In industry, sodium pyrosulfite is used in printing and dyeing, organic synthesis, printing, tanning, pharmaceutical and other departments; Sodium pyrosulfite is used in the chemical and pharmaceutical industries for the production of insurance powder, sulfamethazine, analgin, caprolactam, etc., as well as the purification of chloroform, phenylpropanesulfone and benzene formaldehyde. The photographic industry is used as an ingredient for fixing agents. Perfume industry is used to produce vanillin. It is used as preservative in brewing industry, rubber coagulant and dechlorination agent after cotton bleaching. Organic intermediates, dyes and tanning are used as reducing agents, electroplating industry, oilfield wastewater treatment and mineral dressing agent in mines.
CAS No.
7681-57-4
Formula
Na2O5S2
Molecular Mass
190.10700
Exact Mass
189.89800
PSA
124.92000
Logp
0.27220
IUPAC
Sodium metabisulfite
SMILES
[O-]S(=O)S(=O)(=O)[O-].[Na+].[Na+]
Attribute classification
Matter Classification
inorganic
Category
Inorganic Chemicals > Inorganic Salt
Auxiliary > Textile Auxiliaries
Food(Feed) Additives > Bleaching Agents
Auxiliary > Textile Auxiliaries
Food(Feed) Additives > Bleaching Agents
Chemical and Physical Properties
Melting Point
150 °C
Density
1.48
Appearance
White or yellow crystalline powder or small crystals
Acidity and Basicity
acidness reducibility
Export information
HS Code
28321000
Export Rebate
0%
UN No.
1759
DG-Class
8
Risk Code
R22-31-41-36/37/38-52
Safety Label
Xn,Xi
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