Products Description
Chemical Name: Sodium Metabisulfite (Anhydrous)
CAS Number: 7681-57-4
E Number: E223
Molecular Formula: Na₂S₂O₅
Molecular Weight: 190.11 g/mol
Appearance: White crystalline powder or granules
Odor: Practically odorless
Solubility: Freely soluble in water, practically insoluble in alcohol
Sodium Metabisulfite (Na₂S₂O₅), also known as sodium pyrosulfite, is a white crystalline powder or granular chemical compound widely used in various industrial and food applications. This versatile sulfiting agent serves as an effective antioxidant, preservative, and bleaching agent due to its strong reducing properties. With CAS number 7681-57-4 and E number E223, Sodium Metabisulfite meets stringent quality standards for both food-grade and industrial applications.
Specifications of Na2S2O5 Sodium Metabisulfite Powder
Item | Specification |
PURITY (AS Na2S2O5 ) | 97.0%MIN |
SULFUR DIOXIDE (SO2) | 65.0%MIN |
HEAVY METALS (As Pb) | 0.0005%MAX |
WATER INSOLUBLE | 0.05%MAX |
IRON(Fe) | 0.005%MAX |
PH VALUE | 4.0-4.8 |
Key Characteristics and Advantages
Superior Antioxidant Performance: Effectively prevents oxidation and discoloration in food products, extending shelf life significantly
Potent Preservative Action: Inhibits bacterial growth and enzymatic activities that lead to spoilage
Selective Bleaching Capability: Safely removes unwanted colors without affecting nutritional value
Broad pH Compatibility: Functions effectively across a wide pH range in various applications
Cost-Effective Solution: Provides economical preservation compared to alternative methods
Regulatory Compliance: Meets FDA, EU, and other international food safety standards (E223)
Versatile Formulations: Available in different particle sizes and grades for specific application requirements
Primary Applications
Food Industry
Wine Making: Controls fermentation processes, prevents premature oxidation, and eliminates undesirable microorganisms during wine production
Dried Fruit Preservation: Maintains color brightness and extends storage life of apricots, raisins, and other dried fruits
Seafood Processing: Prevents melanosis (black spot formation) in shrimp and crab meat
Potato Products: Preserves natural color in potato chips, French fries, and dehydrated potato flakes
Beverage Clarification: Removes residual chlorine and improves clarity in soft drinks and beer
Sugar Refining: Decolorizes sugar syrups during refining processes
Pharmaceutical Applications
Active Ingredient Protection: Stabilizes sensitive drug compounds against oxidative degradation
Tablet Coating: Used in enteric coating formulations to protect active ingredients
Injectable Solutions: Acts as an antioxidant in certain parenteral preparations
Vitamin Preservation: Protects vitamin C and other labile nutrients in supplement formulations
Industrial Uses
Photographic Development: Essential component in photographic fixing baths for silver halide removal
Textile Bleaching: Whitens cotton fabrics and removes excess dyes after coloring processes
Water Treatment: Dechlorinates municipal water supplies and swimming pool water
Metal Cleaning: Removes tarnish and oxides from copper and brass surfaces
Rubber Chemicals: Functions as an antichlor agent in rubber vulcanization processes
Leather Tanning: Assists in chrome tanning operations and enzyme dehairing procedures
Other Specialized Applications
Electronics Manufacturing: Cleans flux residues from printed circuit boards
Paper Industry: Brightens recycled paper pulp and controls peroxide decomposition
Oil Field Chemicals: Oxygen scavenger in drilling muds and completion fluids
Analytical Chemistry: Standard reagent for iodometric titrations and sulfur determinations
PACKING: 25KG NET / BAG
STORAGE AND TRANSPORT: IN DRY AND COOL NORMAL TEMPERATURE
SHELF LIFE: 2 YEARS