- Product Identification
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CAS No. :
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7681-57-4
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EINECS No. :
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231-673-0
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H.S. Code :
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2832.1000
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Formula :
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Na2S2O5
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Molecular Weight :
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190.10
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Synonyms :
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Dinatriumdisulfit; Disulfito De Disodio; Disulfite De Disodium; Disodium Disulfite; Disodium Salt Pyrosulfurous Acid; Disulfurous Acid, Disodium Salt; Pyrosulfurous Acid, Disodium Salt; Sodium Metabisulfite; Sodium Disulfite; Sodium Pyrosulfite;
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- Physical And Chemical Properties
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Physical State :
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White or yellowish crystal powder
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Melting Point :
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150 C (Decomposes)
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Specific Gravity :
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1.48
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Solubility in water :
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54 g/100ml (20oC); 81.7 g/100ml (100oC)
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NFPA Ratings :
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Health: 2; Flammability: 0; Reactivity: 0
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Stability :
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Stable under ordinary conditions
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- Applications
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l Industrial Grade :
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- Printing dyeing mordant, Dechlorinating agent for washed fabric.
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- Medical deoxidizer and sulfonating agent.
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- Bleaching agent of bamboo, wood and paper fiber.
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- Non-ferrous mineral separation agent.
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- Waste water disposing agent.
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- Rubber coagulator.
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- Alkyl spice aldehyde in spice industry.
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- Depilating agent, softening agent and anti-wear agent in leather industry.
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- Reducer of developer and protective agent of fixative in sensitization industry.
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l Food Grade :
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- Bleaching agent ( Sugar, Pastry, Water-soaked bamboo slices, Mushrooms, etc ).
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- Loosening agent ( Bread, Biscuit, etc ).
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- Corrosion Protection Antiseptic ( Fruit juice, Can, brewing, grain storage, etc ).
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- Antioxidant and Fresh keeping agents ( Lily flower, Sea Food, Fruit, Vegetables, etc ).
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- Specification
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Testing Items
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Quality Standard (Food Grade)
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Quality Standard (Industrial Grade)
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Purity - Na2S2O5 :
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96.5% Min
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96.5% Min
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Water Insoluble :
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0.05% Max
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0.05% Max
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Iron (Fe) :
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0.003% Max
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0.005% Max
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Arsenic (As) :
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0.0001% Max
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0.0001% Max
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Heavy Metal (Pb) :
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0.0005% Max
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-
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Clarity :
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Pass
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-
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- Transportation
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Storage :
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Store in a cool, dry, well-ventilated warehouse.
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Packing :
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In 25kgs /50kgs /1000kgs net p.p. woven bags
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- Other Trade Information
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Min. Order Quantity :
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25 MTS
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Supply Capacity :
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22,000mts /Year
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Loading Capacity :
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27Mts/1080Bags (1x20'FCL)
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Port of Loading :
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Huangpu / Hengyang / Tianjin, China
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Fresh Stocks :
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Yes
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Ref. Price :
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USD305.- ~ USD320.-/MT FOB Huangpu / Tianjin, China
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Shipment Time :
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Within 2-3 weeks upon receipt of advance payment or L/C .
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Payment Terms :
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T/T, L/C ( Sight / 90days ), D/P, Western Union
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Origin :
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Hunan, Tianjin
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Sample Availability :
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Yes
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Main Export Markets :
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South Africa, Thailand, Myanmar, Pakistan, Lebanon, Turkey, Iran, Spain
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