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High 97% Purity Sodium Sulfite Food Grade Vegetable Preservative Bleaching Agents

High 97% Purity Sodium Sulfite Food Grade Vegetable Preservative Bleaching Agents

    • High 97% Purity Sodium Sulfite Food Grade Vegetable Preservative Bleaching Agents
    • High 97% Purity Sodium Sulfite Food Grade Vegetable Preservative Bleaching Agents
    • High 97% Purity Sodium Sulfite Food Grade Vegetable Preservative Bleaching Agents
  • High 97% Purity Sodium Sulfite Food Grade Vegetable Preservative Bleaching Agents

    Product Details:

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

    Payment & Shipping Terms:

    Minimum Order Quantity: 1 metric ton
    Price: usd 430 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: Sodium Sulfite Vegetable Preservative Other Name: Vegetable Preservative Anhydrous Sodium Sulphite
    Color: White Crystalline Usage: Vegetable Preservative
    Mocular: Na2SO3 CAS NO: 7757-83-7







    Sodium Sulfite Anhydrous

    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.

    Molecular Formula : Na2SO3

    Molecule Weight : 126.04

    CAS NO .: 7757-83-7

    Appearance : White Free Flowing Fine Crystal or Powder

    Specification for Industry Grade and Food Grade :

    Item Quality Index
    Industry Grade Food Grade
    Purity ( As Na2SO3) 96.0% min 98.0% min
    Sodium sulphate ( SO4) 2.0% max 1.0% max
    Chlorides ( As NaCL) 0.5% max 0.1% max
    Arsenic ( As ) - 0.0002% max
    Heavy metals ( As Pb ) - 0.0005% max
    Iron (Fe) 0.005% max 0.002% max
    Water insolubles 0.05% max 0.02% max


    Specification For Photo Grade and Pharmaceutical Grade

    Item Quality Index
    Photo Grade Pharmaceutical Grade
    Purity ( As Na2SO3) 98.0% min 98.0% min
    Sodium sulphate ( SO4 ) 1.0% max 1.0% max
    Chlorides ( As CL-) 0.05% max 0.05% max
    Arsenic ( As ) 0.0002% max 2ppm max
    Lead ( As Pb) 0.0005% max 2ppm max
    Iron (Fe) 0.001% max 5ppm max
    Selenium ( Se) 0.0001% max 1ppm max
    Zinc ( Zn) 0.0001% max 1ppm max
    Copper ( Cu ) 0.0001% max 0.1ppm max
    Mercury ( Hg) 0.0001% max 0.1 ppm max

    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 formaldehyde phenylpropanoid Sulfone


    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.


    No solid waste generated in our factory.

    Keywords: sodium metabisulfite process technology, sodium pyrosulfite technology mass production process, SMBS process, SMBS production, SMBS project, SMBS system, SMBS device.


    Basic information

    Product Name: Sodium sulfite
    Synonyms: Sodium sulfite anhydrous;SODIUM SULFITE, EXSICCATED;SODIUM SULPHITE;anhydroussodiumsulfite;disodiumsulfite;exsiccatedsodiumsulfite;natriisulphis;natriumsulfid
    CAS: 7757-83-7
    MF: Na2O3S
    MW: 126.04
    Product Categories: Inorganic Chemicals;Inorganics;Water Ttreatment Chemicals;Analytical Reagents for General Use;Disulfide Bridge Cleavage Reagents;Denaturation;Synthetic Reagents;ACS GradeBiochemicals and Reagents;Synthetic Reagents;inorganic compound;Paper, glass, printing and dyeing
    Mol File: 7757-83-7.mol

    1.Grade Food grade
    2.Purity 97%
    3.Molecular formula Na2SO3
    5. CAS No 7757-83-7
    6. HS CODE 28321000
    7. EINECS No 231-821-4

    Packing : External packing is PP woven bag, Internal packing is PE bag,25 kgs, 50 kgs, 1000 kgs, and 1250 kgs bag packing.

    Storage & defence: Stored in cool and dry place, avoid moisture and heat. No breakage, No mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It should be transported by clean car, with covering matter, avoid rain.



    Physical and chemical properties:
    White crystalline or powder form; triangular prism crystal shape; alkaline water solution with pH at 9 – 9.5; The highest water solubility is about 28% with temperature at 33.4°C. When exposed to air, it is oxidized to form sodium sulfate. When heated to high temperature, it decomposes to form sodium sulfide; Density: 2.633(15.4°C), Refractive Index: 1.565; Molecular Weight: 126.04.


    Chemical Properties


    melting point 500 °C
    density 2.63
    refractive index 1,484
    storage temp. Store at RT.
    solubility H2O: 1 M at 20 °C, clear, colorless
    Water Solubility 23 g/100 mL (20 ºC)
    Sensitive Hygroscopic
    Stability Stable. Incompatible with strong acids. Moisture and air sensitive.

    Technical specification



    Anhydyous sodium sulphite
    English name Anhydyous sodium sulphite
    Molecular formula Na2SO3
    Technical specifications High purity grade Refined grade Photographic grade Industrial grade Industrial grade Industrial grade
    Sodium sulfite Sodium sulfite Sodium sulfite High-class product High-class product First grade product
    Na2SO3 ≥ % 98 98 97 98 97 96
    Fe ≤ % 0.0005 0.002 0.005 0.003 0.003 0.005
    Water insoluble ≤ % 0.005 0.01 0.05 0.02 0.02 0.03
    Free alkali ≤ % 0.1 0.3 0.15 0.1 0.1 0.4
    Sodium sulfate ≤ % 1.5 1.5 1.5 2.5
    Sodium chloride ≤ % 0.005 0.02 0.01 0.1
    Heavy metal on Pb≤ % 0.001 0.002 0.002
    As ≤ % 0.0001 0.0005
    Sodium thiosulfate ≤% 0.01 0.02 0.03
    Aqueous solution appearance Qualified Qualified Qualified
    Reaction of silver nitrate ammonia solution Qualified







    High 97% Purity Sodium Sulfite Food Grade Vegetable Preservative Bleaching Agents

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    Contact Person: Ms.xie

    Tel: +8613975090964

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