Molecular Formula: Na₂SO₃
Molecular Weight: 126.04
CAS Number: 7757-83-7
HS Code: 283210
Payment Term: T/T, L/C
Trade Term: FOB, CFR, CIF1. Basic Product Information
Product Name: Sodium Sulfite/ Anhydrous Sodium Sulfite
Chemical Name: Anhydrous Sodium SulfiteProduct Introduction:material, appearing as white crystalline powder and granules. Easily soluble in water, slightly soluble in ethanol, with excellent reducibility, bleaching and antioxidant properties. It is divided into industrial grade and food grade. Adopting soda ash and sulfur dioxide refining process, it features high purity, low impurities and stable batch quality. It is widely used in textile printing, papermaking, chemical synthesis, water treatment and food preservation, fully compliant with international export standards.
3. Technical Specification Table
Executive Standard: Industrial Grade: HG/T 2967-2020; Food Grade: GB 1894-2005
4. Product Characteristics
Strong Reducibility & Bleaching Performance: Excellent deoxidation and decolorization capacity, effectively removing pigment impurities and inhibiting enzymatic browning, stable bleaching effect without damaging materials.
Fast Dissolving & Clear Solution: Fast water solubility, no precipitation after dissolution, suitable for automatic batching systems and continuous production lines.
Strict Grade Control: Separate production lines for industrial and food grade, no cross-mixing. Strict heavy metal & arsenic control ensures food grade safety standards.
Stable Chemical Property: Stable at room temperature, effective in bleaching, anti-oxidation and deoxidation, widely compatible with multiple industries and formulas.
Stable Batch Quality: Standardized production process, consistent quality in different batches, suitable for large-scale procurement and long-term supply5. Main Application Fields
1. Industrial Grade Sodium Sulfite
Textile & Printing Industry: Reducing agent for textile bleaching, color fixing and deoxidation, effectively stabilizing dyeing color tone and preventing color difference.
Paper Making Industry: Pulp bleaching agent, used to improve paper whiteness and toughness, widely used in paper pulp processing.
Chemical Industry: Raw material for chemical synthesis, reducing agent for dyes, spices and organic intermediates.
Water Treatment Industry: Boiler oxygen scavenger, industrial wastewater reducing agent, prevents pipeline oxidation and corrosion.
Other Industries: Leather tanning, electroplating auxiliary, photographic developing agent, mineral flotation auxiliary.