Sign In | Join Free | My
Search by Category
Wholesale Marketplace
Home > Food Additive Products >

Na2SO3 97% Purity Sodium Sulfite Anhydrous , Sodium Sulfite Cas No 7757 83 7

Categories Sodium Sulfite Food Grade
Brand Name: Kemsky
Model Number: sodium sulfite SSA
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: sodium sulfite SSA
other name: SSA anhydrous sodium sulphite
situation: dry powder white crystalline
usage: fruit additive,antioxidant,stablizer
purity: Na2SO3, 97%
CAS NO: 7757-83-7
  • Haven't found right suppliers
  • Our buyer assistants can help you find the most suitable, 100% reliable suppliers from China.
  • And this service is free of charge.
  • we have buyer assistants who speak English, French, Spanish......and we are ready to help you anytime!
  • Submit Buying Request
    • Product Details
    • Company Profile

    Na2SO3 97% Purity Sodium Sulfite Anhydrous , Sodium Sulfite Cas No 7757 83 7



    Factory offer competitive price sodium sulfite na2so3 sodium sulfite anhydrous

    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 photography and for reducing chlorine levels in pools.

    Product Name:Sodium sulfite
    Synonyms:Sodium sulfite anhydrous;SODIUM SULFITE, EXSICCATED;SODIUM SULPHITE;anhydroussodiumsulfite;disodiumsulfite;exsiccatedsodiumsulfite;natriisulphis;natriumsulfid
    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.GradeFood grade
    3.Molecular formulaNa2SO3
    5. CAS No7757-83-7
    6. HS CODE28321000
    7. EINECS No231-821-4

    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.


    The role of anhydrous sodium sulfite is extensive, it is in the pharmaceutical industry, paper making, leather tanning and dyeing industries and plant fiber bleaching, food, etc have a very important role. Addition of anhydrous sodium sulfite is also used to film developing, bleaching agents, printing and dyeing industry as a deoxygenation agent.

    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 point500 °C
    refractive index1,484
    storage temp.Store at RT.
    solubilityH2O: 1 M at 20 °C, clear, colorless
    Water Solubility23 g/100 mL (20 ºC)
    StabilityStable. Incompatible with strong acids. Moisture and air sensitive.

    Technical specification


    Index name

    Analytically pure-ARChemical pure-CPHigh purity
    Clarity testQualifiedQualified
    Water insoluble≤0.005≤0.01≤0.03
    Sulphurous acid( counted by Na2HSO3 )QualifiedQualified
    Free alkali( counted by Na2CO3 )≤0.1≤0.3≤0.5
    Thiosulfuric acid(S2O3)≤0.01≤0.02≤0.04
    Heavy metal(counted by Pb)≤0.001≤0.002≤0.003


    Anhydyous sodium sulphite
    English nameAnhydyous sodium sulphite
    Molecular formulaNa2SO3
    Technical specificationsHigh purity gradeRefined gradePhotographic gradeIndustrial gradeIndustrial gradeIndustrial grade
    Sodium sulfiteSodium sulfiteSodium sulfiteHigh-class productHigh-class productFirst grade product
    Na2SO3 ≥ %989897989796
    Fe ≤ %0.00050.0020.0050.0030.0030.005
    Water insoluble ≤ %0.0050.
    Free alkali ≤ %
    Sodium sulfate ≤ %
    Sodium chloride ≤ %0.0050.020.010.1
    Heavy metal on Pb≤ %0.0010.0020.002
    As ≤ %0.00010.0005
    Sodium thiosulfate ≤%
    Aqueous solution appearanceQualifiedQualifiedQualified
    Reaction of silver nitrate ammonia solutionQualified

    Quality Na2SO3 97% Purity Sodium Sulfite Anhydrous , Sodium Sulfite Cas No 7757 83 7 for sale
    Send your message to this supplier
    Characters Remaining: (0/3000)
    Inquiry Cart 0

    Home| Products| Suppliers| Quality Suppliers| Site Map |About Us |Contact Us |Help |关于我们 |联系我们

    Copyright © 2009 - 2021 All rights reserved.