Product Overview
Sodium Bisulfite 40% – Technical Grade
Sodium Bisulfite (NaHSO₃) 40% solution is a clear, acidic liquid widely used in industrial water treatment, chemical manufacturing, and process applications requiring controlled reduction. Known for its sulfur-based reducing properties, this solution provides reliable performance in neutralizing residual chlorine, reducing metal ions, and supporting chemical conversion processes in high-volume treatment systems.
Applications:
Water & Wastewater Treatment:
Commonly used to neutralize chlorine and chloramine in treated water before discharge or reuse. Effective for both municipal systems and industrial process water.
Pulp & Paper Manufacturing:
Serves as a key reducing agent in the bleaching stage of pulp processing, where controlled sulfur dioxide release improves brightness and chemical efficiency.
Textile & Fabric Processing:
Used for color stripping, bleaching, and as a reductive rinse in dyeing and fabric finishing operations.
Industrial Waste Neutralization:
Applied in wastewater systems to reduce hexavalent chromium, mercury, and other heavy metals prior to filtration or chemical precipitation.
Mining & Mineral Extraction:
Supports leaching and metal recovery processes by altering oxidation states of target compounds in ore and tailings processing.
Food & Beverage (Non-Direct Use):
Used in ancillary roles such as equipment rinse cycles or boiler water conditioning in food-related facilities (not for direct food contact).
Chemical Characteristics:
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Chemical Formula: NaHSO₃
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Molecular Weight: 104.06 g/mol
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Concentration: 40% w/w
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Specific Gravity @ 20°C: 1.36
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pH (typical): 3.5 – 4.5
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SOâ‚‚ Content: 24.0 – 25.5%
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Free Sulfur Dioxide: <0.1%
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Iron Content: <10 ppm
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Appearance: Clear to pale yellow liquid
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Solubility: Fully soluble in water and alcohols
Safety Information:
Sodium bisulfite may release toxic sulfur dioxide (SOâ‚‚) fumes upon acid contact or improper storage. Use in well-ventilated areas with adequate containment and PPE. Wear chemical-resistant gloves, splash goggles, and acid-resistant protective clothing. Avoid contact with strong oxidizers and acids. Store in a cool, shaded area in compatible plastic containers with secure lids. Eyewash and emergency shower stations must be present in all handling areas.
Overall:
Technical Grade Sodium Bisulfite 40% offers a stable and consistent reducing agent solution suitable for high-volume water systems, manufacturing processes, and industrial chemical treatment. Each batch is tested to ensure tight control of SOâ‚‚ content and minimal trace metals, delivering dependable results across environmental, mining, and industrial wastewater applications.
