Sodium Metabisulfite (Food Grade)

Sodium metabisulfite, also known as E223, is a food additive used for its antioxidant and antimicrobial properties. It is commonly employed in the food industry to preserve the freshness of foods and extend their shelf life.

Key Uses:

• Food Preservation: Prevents discoloration and deterioration of fruits, vegetables, seafood, and certain meats.
• Wine Industry: Used as a disinfectant and preservative in wine production.
• Beer Industry: Sometimes used to prevent oxidation and protect the flavor of beer.
• Bakery Industry: Used as a flour bleaching agent.
• Drying of Fruits: Preserves the color of dried fruits.

Safety: While sodium metabisulfite is generally considered safe when used according to guidelines, it can cause allergic reactions in some individuals, especially those with asthma. People sensitive to sulfites should carefully read food labels and avoid products containing this additive.

Specifications:

Appearance: White or pale yellow crystalline powder with a sulfur dioxide odor.

• SO2 Content: Minimum 98% (w/w)
• Na2S2O3 Content: Minimum 66.02% (w/w)
• Na2SO4 Content: Maximum 0.02% (w/w)
• Iron (Fe) Content: Maximum 2 ppm
• Heavy Metals (Excluding Fe, Pb): Maximum 5 ppm
• Chloride (Cl) Content: Maximum 0.02% (w/w)
• Arsenic (As) Content: Maximum 0.5 ppm
• Lead (Pb) Content: Maximum 0.05 ppm
• Cadmium (Cd) Content: Maximum 50 ppb
• Selenium (Se) Content: Maximum 0.5 ppm
• Insolubility: None
• pH (5% Solution): 4-4.6
• Mercury (Hg) Content: Maximum 0.1 ppm

Packaging:

Shipped in 25 kg polyethylene bags, moisture-resistant, or in 900 kg to 1000 kg polypropylene big bags with polyethylene liners.

Applications:

• Antichlorine in Textile Bleaching
• Antiseptic in Cellulose Ester Production
• Key Raw Material in Sodium Hydrosulfite, Aromatic Alcohols, and Aldehydes Production
• Preservative and Disinfectant in Food and Beverage Industries as a Source of Sulfur Dioxide
• Antiseptic in Fermentation Processes
• Color Removal in Paint and Leather Industries
• Disinfectant in Cosmetic and Preservative Industries
• Various Applications in Paper, Fiber, Rubber, and Adhesive Industries

Storage and Handling:

It should be stored in a dry, closed place, avoiding air contact. Its activity is lost in humid environments due to sulfur dioxide. Contact with air should be avoided. Do not use in poorly ventilated covered areas.

Chemical Formula:

The chemical formula for sodium metabisulfite is Na2S2O5.

CAS Number:

The Chemical Abstracts Service (CAS) number for sodium metabisulfite is 7681-57-4.