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ISO 9001 SGS Sodium Sulfite Water Treatment White Powder EC NO. 231-821-4

ISO 9001 SGS Sodium Sulfite Water Treatment White Powder EC NO. 231-821-4

    • ISO 9001 SGS Sodium Sulfite Water Treatment White Powder EC NO. 231-821-4
    • ISO 9001 SGS Sodium Sulfite Water Treatment White Powder EC NO. 231-821-4
    • ISO 9001 SGS Sodium Sulfite Water Treatment White Powder EC NO. 231-821-4
  • ISO 9001 SGS Sodium Sulfite Water Treatment White Powder EC NO. 231-821-4

    Product Details:

    Place of Origin: Hunan
    Brand Name: Kemsky
    Certification: ISO 9001 SGS
    Model Number: sodium sulfite white power

    Payment & Shipping Terms:

    Minimum Order Quantity: 1 metric ton
    Price: usd 510 per metric ton
    Packaging Details: 25 kgs bag,1000 kgs big bag
    Delivery Time: 5-8 days
    Payment Terms: T/T , L/C
    Supply Ability: 3000 tons per month
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    Detailed Product Description
    Name: White Power Sodium Sulfite Other Name: Anhydrous Sodium Sulphite White Power
    Situation: Powder Shelf Life: 24 Months
    Usage: Pool Water Treatment Packing: 1250 Kgs Bag





    Transportation Information:


    DOT Classification: Not a DOT controlled material
    U.N. Not applicable
    Packing Group: Not applicable


    Handing & Storage


    (1).Precautions:Do not ingest. Do not breathe dust. Wear suitable protective clothing. If ingested, seek medical advice immediately and show the container or the label. Keep away from incompatibles such as oxidizing agents, combustible materials, organic materials, acids.


    (2).Storage: Air sensitive. Moisture sensitive. Keep container tightly closed. Keep container in a cool, well-ventilated area.

    Sodium sulfite  
    Other names  
    Hypo clear(photography)  
    CAS Number · 7757-83-7
    3D model (JSmol) · Interactive image
    ChEBI · CHEBI:86477
    ChemSpider · 22845
    ECHA InfoCard 100.028.929
    EC Number 231-821-4
    E number E221 (preservatives)
    PubChem CID · 24437
    RTECS number WE2150000
    Chemical formula Na2SO3
    Molar mass 126.043 g/mol
    Appearance white solid
    Odor odorless
    Density 2.633 g/cm3 (anhydrous)
    1.561 g/cm3 (heptahydrate)  
    Melting point 33.4 °C (92.1 °F; 306.5 K) (dehydration of heptahydrate)
    500 °C (anhydrous)  
    Boiling point Decomposes(separate (substances) into constituent elements)
    Solubility in water 27.0 g/100 mL water (20 °C)
    Solubility soluble in glycerol insoluble in ammonia,chlorine
    log P -4
    Acidity (pKa) ~9 (heptahydrate)
    Refractive index(nD) 1.565
    Crystal structure hexagonal (anhydrous)
    monoclinic (heptahydrate)  
    Safety data sheet ICSC 1200



    Descriptive chemistry

    Sodium sulfite is decomposed by even weak acids, giving up sulfur dioxide gas.
    Na2SO3 + 2 H+ → 2 Na+ + H2O + SO2
    A saturated aqueous solution has pH of ~9. Solutions exposed to air are eventually oxidized to sodium sulfate. If sodium sulfite is allowed to crystallize from aqueous solution at room temperature or below, it does so as a heptahydrate. The heptahydrate crystals effloresce in warm dry air. Heptahydrate crystals also oxidize in air to form the sulfate. The anhydrous form is much more stable against oxidation by air.


    Sodium sulfite forms a bisulfite adduct with aldehydes, and with ketones forms a sulfonic acid. It is used to purify or isolate aldehydes and ketones.
    Sodium sulfite (sodium sulphite) is a soluble sodium salt of sulfurous acid (sulfite) with the chemical formula Na2SO3. It is a product of sulfur dioxide scrubbing, a part of the flue-gas desulfurization process. It is also used as a preservative to prevent dried fruit from discoloring, and for preserving meats, and is used in the same way as sodium thiosulfate to convert elemental halogens to their respective hydrohalic acids, in photographyand for reducing chlorine levels in pools.
    Sodium Sulfite is a white crystal or powder with reducing property. Sodium sulfite exhibits bleaching, de-sulfurizing, and dechlorinating activities. This agent was used by food industry to help maintain the fresh appearance of food products. It is also a component in many drugs, which helps maintain their potency and stability. FDA has ruled sodium sulfite a new animal drug of low regulatory priority.
    SODIUM SULFITE is a white odorless powder. Density 2.633 g / cm3. Moderately toxic. Sinks in water and dissolves slowly. Also transported as a heptahydrate Na2SO3.7H2O.


    Sodium sulfite is primarily used in the pulp and paper industry. It is used in water treatment as an oxygen scavenger agent, to treat water being fed to steam boilers to avoid corrosion problems,[2] in the photographic industry to protect developer solutions from oxidation and (as hypo clear solution) to wash fixer (sodium thiosulfate) from film and photo-paper emulsions, in the textile industry as a bleaching, desulfurizing and dechlorinating agent and in the leather trade for the sulfitization of tanning extracts. It is used in the purification of TNT for military use. It is used in chemical manufacturing as a sulfonation and sulfomethylation agent. It is used in the production of sodium thiosulfate. It is used in other applications, including froth flotation of ores, oil recovery, food preservatives, and making dyes.

    ISO 9001 SGS Sodium Sulfite Water Treatment White Powder EC NO. 231-821-4

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    Tel: +8613975090964

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