-  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

l       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.

l       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