99% Industry Grade Sodium Metabisulfite price 7681-57-4

Sodium metabisulfite is prepared by saturating a solution of Sodium Hydroxide with sulfur dioxide and allowing crystallization to occur; hydrogen is passed through the solution to exclude air. Sodium metabisulfite may also be prepared by saturating a solution of sodium carbonate with sulfur dioxide and allowing crystallization to occur, or by thermally dehydrating sodium bisulfite. It is a kind of inorganic salt belonging to Inorganic Chemicals. 

 Wuhan Ruisunny Chemical Co., Ltd has been focusing on trading of such chemicals as Calcium Hypochlorite, Trichloroisocyanuric Acid, Ammonium Bicarbonate, Sodium hydroxide, Hydrogen Peroxide and Silane etc. since 2007. We hereby have following details for the product as:

1)    Basic information for the sodium metabisulfite

Product name: sodium metabisulfite

Alias:      Sodium metabisulfite, SO2 58.5% min;disodiummetabisulfite;disodiumpyrosulphite;fertisilo;metabisulfitedesodium;Sodiummetabisufite;SodiumMetabisulphiteAcs;SodiumMetabisulphiteExtraPure;

CAS No. : 7681-57-4

EINECS: 231-673-0

Molecular Formula (MF):      Na2S2O5

Molecular Weight (MW):     190.11

2）  Physical and chemical properties

Appearance: White to slightly yellow sulphorous powder/solid

Specific density: 1.48 g/ml;

Melting Temp.: 300 Celsius degree

Product specification: 92.5-96.5% min.

Packing: 25kg or 50kg bag; or as requested.

3)     Notice on Safety information:

Danger Class: 8

Risk Statements: 22-31-41-36/37/38-52;

Safety Statements: 26-39-46-36-16;  

UN NO. Under IMDG:  1759/2693;

Packing Group:    III

Toxicity: LD50 orally in Rabbit: 1540 mg/kg LD50 dermal Rat > 2000 mg/kg; 

Safety Profile

An inhalation hazard. Poison by intravenous route. Moderately toxic by parenteral route. Experimental reproductive effects. Mutation data reported. When heated to decomposition it emits toxic fumes of SOx and Na2O.

4)    Application:

Sodium metabisulfite has several applications in different industries, some of which include:

1. Food Industry: It is used as a Food Preservative and antioxidant to prevent spoilage and discoloration of food products.

2. Water Treatment: It is used as a reducing agent in water treatment to remove excess chlorine and other oxidizing agents.

3. Pulp and Paper industry: It is used as a bleaching agent and reducing agent in the pulp and paper industry to improve the brightness and color of paper products.

4. Textile Industry: It is used as a reducing agent and bleaching agent in the textile industry to remove excess dyes and other impurities from fabrics.

5. Pharmaceutical Industry: It is used as a preservative in some medications, particularly in injectable solutions.

6. Wine making and beer brewing: It is used as a source of sulfur dioxide in wine making and beer brewing to prevent oxidation and bacterial growth.

7. Photographic Industry: It is used as a developing agent in photographic film and paper.

8. Chemical Industry: It is used as a reducing agent and antioxidant in various chemical reactions.