Sodium Metabisulphite

- Product Identification
CAS No.: 7681-57-4
EINECS No.: 231-673-0
H.S. Code: 2832.1000
Formula: Na2S2O5
Molecular Weight: 190.10
Synonyms: 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;

- Physical and Chemical Properties
Physical State: White or yellowish crystal powder
Melting Point: 150 C (Decomposes)
Specific Gravity: 1.48
Solubility in water: 54 g/100ml (20 oC); 81.7 g/100ml (100 oC)
NFPA Ratings: Health: 2; Flammability: 0; Reactivity: 0
Stability: Stable under ordinary conditions

- Applications
Industrial Grade:
- Printing dyeing mordant, Dechlorinating agent for washed fabric.
- Medical deoxidizer and sulfonating agent.
- Bleaching agent of bamboo, wood and paper fiber.
- Non-ferrous mineral separation agent.
- Waste water disposing agent.
- Rubber coagulator.
- Alkyl spice aldehyde in spice industry.
- Depilating agent, softening agent and anti-wear agent in leather industry.
- Reducer of developer and protective agent of fixative in sensitization industry.
Food Grade:
- Bleaching agent ( Sugar, Pastry, Water-soaked bamboo slices, Mushrooms, etc ).
- Loosening agent ( Bread, Biscuit, etc ).
- Corrosion Protection Antiseptic ( Fruit juice, Can, brewing, grain storage, etc ).
- Antioxidant and Fresh keeping agents ( Lily flower, Sea Food, Fruit, Vegetables, etc ).

- Specification
Testing Items / Quality Standard (Food Grade) / Quality Standard (Industrial Grade)
Purity - Na2S2O5: 96.5% Min / 96.5% Min
Water Insoluble: 0.05% Max / 0.05% Max
Iron (Fe): 0.003% Max / 0.005% Max
Arsenic (as): 0.0001% Max / 0.0001% Max
Heavy Metal (Pb): 0.0005% Max / -
Clarity: Pass / -

- Transportation
Storage: Store in a cool, dry, well-ventilated warehouse.
Packing: In 25kgs /50kgs /1000kgs net p.p. Woven bags

- Other Trade Information
Min. Order Quantity: 25 MTS
Supply Capacity: 22,000mts /Year
Loading Capacity: 27Mts/1080Bags (1x20'FCL)
Port of Loading: Huangpu / Hengyang / Tianjin, China
Fresh Stocks: Yes
Ref. Price: USD305.- ~ USD320.-/MT FOB Huangpu / Tianjin, China
Shipment Time: Within 2-3 weeks upon receipt of advance payment or L/C.
Payment Terms: T/T, L/C ( Sight / 90days ), D/P, Western Union
Origin: Hunan, Tianjin
Sample Availability: Yes
Main Export Markets: South Africa, Thailand, Myanmar, Pakistan, Lebanon, Turkey, Iran, Spain