Sodium chlorite is liquid,white or microyellow green crystal, alkaline, slightly moisture absorption. Soluble in water and alcohol, is stable at room temperature and normal storage conditions, and its stability is greater than sodium hypochlorite and less than sodium chlorate.
| COMPONENT | MAX% WT | ANALYSIS DATA% WT | RESULT |
| ACTIVE SODIUM CHLORITE | 80%MIN | 80.8 | QUALIFIED |
| NaCLO3 | 4.0 | 0.01 | QUALIFIED |
| NaCL | 19.0 | 16.4 | QUALIFIED |
| NaOH | 3.0 | 0.05 | QUALIFIED |
| Na2CO3 | 2.0 | 0.5 | QUALIFIED |
| Na2SO4 | 3.0 | 0.03 | QUALIFIED |
| SODIUM NITRATE | 0.1 | 0.04 | QUALIFIED |
| ARSENIC | 3ppm | ＜3ppm | QUALIFIED |
| Specifications (25% Liquid & 31% Liquid) | |
| Items | Control standard |
| Appearance | Light green yellow solution |
| Sodium chlorite (NaClO2) | ≥31% |
| Sodium chlorate (NaClO3) | ≤0.8% |
| Sodium hydroxide (NaOH) | ≤0.4% |
| Sodium chloride (NaCl) | ≤2.0% |
| Package | Packed in 200 liter polythene plastic drums , net weight: 250kg/drum and 1250kg IBC Tank. |
Applications of Sodium Chlorite
Sodium chlorite’s ability to release chlorine dioxide (ClO₂) gas makes it invaluable for oxidation and biocidal activities across sectors:
- Water Disinfection: Precursor for ClO₂ in potable water, wastewater, and cooling towers, effectively inactivating bacteria, viruses, and protozoa without forming trihalomethanes.
- Pulp and Paper Bleaching: Provides elemental chlorine-free (ECF) bleaching, preserving fiber strength while achieving high brightness levels in paper production.
- Textile and Dyeing: Acts as a color discharge agent and antichlor in fabric processing, ensuring uniform dyeing and reduced environmental discharge.
- Food and Beverage Processing: Sanitizes equipment and surfaces in meat, poultry, and fruit washing, compliant with FDA approvals for residue-free cleaning.
- Legionella Control: Targets biofilm in HVAC systems and hospitals, preventing outbreaks through sustained antimicrobial action.
- Oil and Gas: Inhibits microbial-induced corrosion in pipelines and enhances oil recovery via targeted oxidation.
Global usage surpasses 100,000 tons yearly, propelled by demand for sustainable disinfection alternatives to chlorine gas.
Why Choose Aozun Chem’s Sodium Chlorite?
- Reliable Purity: Meets EPA and ISO 9001 standards, with low heavy metals (<10 ppm) for safe ClO₂ generation and minimal scaling.
- Cost-Effective Delivery: Bulk quantities at optimized rates, with proven supply stability.
- Global Logistics: Timely shipments to Asia, Europe, and North America, MOQs from 1 MT.
- Technical Expertise: Guidance on generator systems, dosage calculations, and regulatory filings.
- Eco-Safe Formulation: Supports green chemistry by enabling byproduct-free oxidation, aligned with REACH and TSCA compliance.
Integrate Aozun Chem’s sodium chlorite to safeguard water quality and streamline bleaching efficiency.
Frequently Asked Questions (FAQs)
What is sodium chlorite, and how does it function as a disinfectant?
Sodium chlorite (NaClO₂) is a sodium salt of chlorous acid, primarily used to generate chlorine dioxide (ClO₂) via acidification or reaction with hypochlorite. As a disinfectant, ClO₂ penetrates cell walls to oxidize proteins and nucleic acids, eliminating pathogens like E. coli and Giardia at concentrations as low as 0.1 ppm, with superior efficacy in cold water.
How is it produced industrially?
It is synthesized by reducing sodium chlorate (NaClO₃) with sodium dioxide (Na₂O₂) in aqueous solution or through electrolytic disproportionation of sodium chlorate. These processes yield technical-grade material at 80-85% purity, with efficiencies over 90% in modern continuous-flow reactors.
What safety hazards are associated with sodium chlorite?
As a strong oxidizer, it can accelerate fires and explode with combustibles or acids; handle with PPE, avoiding metal contact to prevent decomposition. It irritates skin, eyes, and lungs (TLV 0.1 ppm for ClO₂ vapor)—store in cool, dry, non-metallic containers. Oral LD50 is ~165 mg/kg in rats, requiring ventilation and spill neutralization with bisulfite.
Is sodium chlorite approved for drinking water treatment?
Yes, under EPA registration (e.g., for CT values in Giardia inactivation), sodium chlorite generates ClO₂ at 0.8 mg/L max residual, compliant with NSF/ANSI 60 standards. It avoids DBPs like chloramines, making it suitable for municipal systems treating surface water.
What is the shelf life and storage protocol for sodium chlorite?
It retains activity for 12-18 months when stored sealed in plastic or fiberglass containers at <30°C, away from light and moisture to prevent auto-decomposition. Monitor pH (>10) and assay periodically; avoid stacking to minimize pressure buildup.
Can sodium chlorite be used in organic or sustainable applications?
Indeed, it’s GRAS-listed by FDA for organic produce washing and enables low-DBP water treatment, reducing chemical footprints by 50% versus chlorine. In pulp mills, it supports TCF (totally chlorine-free) processes, aligning with FSC certifications for eco-labeled products.
How does sodium chlorite compare to sodium hypochlorite in disinfection?
Sodium chlorite-derived ClO₂ offers broader pH tolerance (6-10) and no chlorate formation, excelling against biofilms and viruses, while hypochlorite (bleach) is cheaper but forms more byproducts. Chlorite is preferred for taste/odor-free water, though costlier at $2-3/kg versus $0.5/kg for hypochlorite.
Access our application notes or request a trial for hands-on sodium chlorite performance.
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