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Reductant Agent Sodium Sulfite Water Treatment HS Code 28321007 SSA 97 % Purity

Categories Sodium Sulfite Water Treatment
Brand Name: Kemsky
Model Number: sodium sulfite anhydrous -reductant agent
Certification: ISO 9001 SGS
Place of Origin: Hunan
MOQ: 1 metric ton
Price: usd 430 per metric ton
Payment Terms: T/T , L/C
Supply Ability: 3000 tons per month
Delivery Time: 5-8 days
Packaging Details: 25 kgs bag,1000 kgs big bag
name: SSA sodium sulfite reductant agent
other name: SSA sodium sulphite anhydrous reductant agent
situation: powder
grade: tech grade
usage: reductant agent
purity: NA2SO3 97%
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    Reductant Agent Sodium Sulfite Water Treatment HS Code 28321007 SSA 97 % Purity


    Molecular Formula : Na2SO3

    Molecule Weight : 126.04

    CAS NO .: 7757-83-7

    Appearance : White Free Flowing Fine Crystal or Powder

    Packing: Packed in 25kg plastic woven bag, Kraft paper bag, PE bag, 500kg/1000kg/1100kg/1200kg jumbo bag or as per the buyer’s requirement

    Storage: Store the product in a dry and cool place.

    Sodium Sulfite Anhydrous

    Specification for Industry Grade and Food Grade :

    ItemQuality Index
    Industry GradeFood Grade
    Purity ( As Na2SO3)96.0% min98.0% min
    Sodium sulphate ( SO4)2.0% max1.0% max
    Chlorides ( As NaCL)0.5% max0.1% max
    Arsenic ( As )-0.0002% max
    Heavy metals ( As Pb )-0.0005% max
    Iron (Fe)0.005% max0.002% max
    Water insolubles0.05% max0.02% max

    Property: white gravel or powder crystal,relative density is 1.561, less to dissolve in water and its water solution has alkaline reaction; it is hard to dissolve in ethanol. It is used to produce chloroform,solasulfone and Benzaldehyde in medical industry.

    SS is used as an antichlor in water treatment and desalination plants; in the reduction of wastewater in chrome-plating industry; as a preservative in the manufacture of trinitrotoluene (TNT); as a bleaching agent and for scrubbing sulphur dioxide gas in pulp mills in power plants and for leather treatment.
    It is also used as an oxygen scavenger in low-pressure boilers and in the manufacture of detergent, sodium thiosulphate and photographic chemicals.

    Specification For Photo Grade and Pharmaceutical Grade

    ItemQuality Index
    Photo GradePharmaceutical Grade
    Purity ( As Na2SO3)98.0% min98.0% min
    Sodium sulphate ( SO4 )1.0% max1.0% max
    Chlorides ( As CL-)0.05% max0.05% max
    Arsenic ( As )0.0002% max2ppm max
    Lead ( As Pb)0.0005% max2ppm max
    Iron (Fe)0.001% max5ppm max
    Selenium ( Se)0.0001% max1ppm max
    Zinc ( Zn)0.0001% max1ppm max
    Copper ( Cu )0.0001% max0.1ppm max
    Mercury ( Hg)0.0001% max0.1 ppm max

    Sodium sulfite
    Other names
    Hypo clear(photography)
    CAS Number· 7757-83-7
    3D model (JSmol)· Interactive image
    ChEBI· CHEBI:86477
    ChemSpider· 22845
    ECHA InfoCard100.028.929
    EC Number231-821-4
    E numberE221 (preservatives)
    PubChem CID· 24437
    RTECS numberWE2150000
    Chemical formulaNa2SO3
    Molar mass126.043 g/mol
    Appearancewhite solid
    Density2.633 g/cm3 (anhydrous)
    1.561 g/cm3 (heptahydrate)
    Melting point33.4 °C (92.1 °F; 306.5 K) (dehydration of heptahydrate)
    500 °C (anhydrous)
    Boiling pointDecomposes(separate (substances) into constituent elements)
    Solubility in water27.0 g/100 mL water (20 °C)
    Solubilitysoluble in glycerol insoluble in ammonia,chlorine
    log P-4
    Acidity (pKa)~9 (heptahydrate)
    Refractive index(nD)1.565
    Crystal structurehexagonal (anhydrous)
    monoclinic (heptahydrate)
    Safety data sheetICSC 1200

    Application :

    (1) Industry Grade : Used in Dyeing and printing Industry ,as dechlorinating agent and bleaching agent, in leather and tanning industry as bleaching agent , developer agent , reductant agent , stabilizer agent , or used in papermaking, electronic and water treatment industry.

    (2) Food Grade: In food industry as additive (E223) preservative, antioxidant and antimicrobic for fruits (dried, glazed and candled), vegetables (onions, potatoes, etc.), juices (citrus and grapes) and fish (shrimps and prawns). In silage treatment as antifermentative. In starch and sweeteners production as bacteriostatic.

    (3) Photo Grade: In the photographic industry as component of developer bath .

    (4) Pharmaceutical Grade : pharmaceutical industry for the production of chloroform, benzene and formaldehydephenylpropanoid Sulfone

    Sodium sulphite

    Product specifications:


    The product is manufactured in the following grades:

    • Food
    • Technical
    Applications:Pulp and paper
    In the production of pulp by sulphite semi-chemical process and chemi-thermo mechanical means
    Water treatment
    As an antichlor
    Boiler water
    As an oxygen scavenger
    Chemicals and drugs
    A moderate reducing agent in the manufacture of sodium thiosulphate, sulphonated chemicals, sulphomethylation, and acetaminophen
    Natural latex rubber
    As a preservative
    As a preservative
    Food industry
    As an antioxidant, enzyme inhibitor and anti-microbial agent
    Fibre industry
    As a solvent for raw materials, an additive for precipitation baths, for bleaching and for desulphurising bobbins
    To destroy chlorine in return brine
    Leather industry
    In the sulphitisation of tanning extract
    In the production of trinitrotoluene (TNT)
    Oil well floatation as an oxygen scavenger
    In the manufacture of sulphosuccinates and shampoo
    Packaging / transportation
    • 25kg polypropylene woven / paper bags with heat sealed inner liner
    • 25kg HDPE bags
    • 500kg, 1,000kg, 1,100kg bulk sacks

    Locally, it is transported in six-wheeler, 10-wheeler and trailer trucks. Internationally, it is transported in 20' containers. The maximum stuffing is 27Mt. / 20' fcl.

    Quality Reductant Agent Sodium Sulfite Water Treatment HS Code 28321007 SSA 97 % Purity for sale
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