Sodium Metabisulfite

Sodium metabisulfite is white or yellow crystalline powder or small crystal, with a strong SO2 odor, soluble in water, the aqueous solution is acidic, when contacted with strong acid, SO2 is released to form corresponding salts, and it is oxidized to Na2S2O6 when placed in the air for a long time. Therefore, the product cannot be stored for a long time. Above 150 degrees Celsius, SO2 is decomposed.
Specification

TEST ITEMS
TEST STANDARD
Na2S2O5 %
96.5
FERRON(Fe) %
0.005
WATER INSOLUBLE %
0.05
ARSENIC(As) %
0.0001
HEAVY METAL(Pb) %
0.0005
Application

Use 1
Used as a coagulant in the rubber industry.
Use 2
Used as chromatographic reagents, preservatives and reducing agents in the dye and pharmaceutical industries.
Use 3
In the food industry, it is used as bleaching agent, preservative, bulking agent, antioxidant, color retention agent and
preservative.
Use 4
In the printing and dyeing industry, it is used as a dechlorination agent for cotton cloth after bleaching, and as a cotton
scouring aid.
Use 5
The tanning industry is used for leather processing.
Use 6
The chemical industry is used to produce hydroxyvanillin, hydroxylamine hydrochloride, etc. The photosensitive industry is used as developer and so on.

Sodium Metabisulfite, E223,CAS no.7681-57-4, appears as a white to yellow colored powder, and is often used in beer and wine making. Sodium Metabisulfite is water soluble and has a sulfur dioxide odor, manufacturing process via chemical synthesis, sodium bisulfite as raw material. Sodium Metabisulfite functions as a preservative and antioxidant known as E223, commonly used in dried fruits, shrimp, maraschino cherries, and lemon drinks.

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Sodium Metabisulfite Specification
ITEM STANDARD
Appearance White or light yellow powder
Content % 96.5
Heavy Metals (Fe) % 0.003
Heavy Metals( As)< % 0.0001
Charity Slightly turbid
SO2 65
PH 4.0-5.0
Heavy Metals( Pb) % 0.0005

Sodium Metabisulfite
Type: Food Additives
Origin: China
CAS No.: 7681-57-4
AUCO No.: 363
Packing: 25kg bag/1000kg bag

Items Standard
Sodium metabisulfite % 97 min
Water insoluble % 0.01 max
Fe % 0.002 max
As % 0.00006 max
Heavy Metals(Pb) % 0.0003 max
PH value 4.0-4.6

Items Standard
Sodium metabisulfite % 97 min
Water insoluble % 0.01 max
Fe % 0.002 max
As % 0.00006 max
Heavy Metals(Pb) % 0.0003 max
PH value 4.0-4.6

Sodium metabisulfite FCC/Photo Grade is a natural compound that can be used as a preservative, antioxidant, bleach, color fixative and leavening agent in both industrial and food applications. It is used as an antioxidant/reducing agent in photographic film, a corrosion inhibitor in the oil/gas industry, a bleaching agent in coconut cream, and a laboratory reagent. It is utilized in gold precipitation to eliminate chromium. Sodium Metabisulfite FCC/Photo Grade is mainly used for food applications; it functions by reacting with oxidizing agents and preventing oxidation and browning of food products. It also inhibits the growth of bacteria, yeast, and mold. It's used in canned mushrooms, candied, vermicelli, and other products to whiten them, keep them fresh, and extend their shelf life. It is used in shrimp, maraschino cherries, lemon drinks, and other products to preserve their color and prevent discoloration. It's also used in wine, beer, juice, and other beverages to prevent spoilage and fermentation, and to enhance their flavor and clarity and in biscuit, baked food, and bread to act as a leavening agent and to improve their texture and volume. Sodium metabisulfite is food grade and meets the standards of the Food Chemical Codex (FCC).
Sales Specification

Appearance: White or slightly yellow crystal powder
Assay (Na2S2O5): 97%
Insoluble in water: 0.03%
Arsenic: 0.002%
Heavy Metal as Pb: 0.001%
As: 0.0002%
Cd: 0.0001%
Fe:0.005%
pH: 4.0-4.6
Packing

50 lb bag , 44 bags per pallet

Sodium metabisulfite or sodium pyrosulfite (IUPAC spelling; Br. E. sodium metabisulphite or sodium pyrosulphite) is an inorganic compoundof chemical formula Na2S2O5. The substance is sometimes referred to as disodium metabisulfite. It is used as a disinfectant, antioxidant, and preservative agent.

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water treatment chemicals ,food preservation ,seasoning ,food additive