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ISO Certicate Sodium Metabisulfite Na2s2o5 For Cotton Wool Making Bleaching Agent

Weifang Duojiao Chemical Co.,ltd

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ISO Certicate Sodium Metabisulfite Na2s2o5 For Cotton Wool Making Bleaching Agent

Brand Name : Haibin
Certification : ISO9001
Place of Origin : Shandong,China
MOQ : 20tons
Price : Negotiable
Supply Ability : 1400tons per month
Delivery Time : 5-15 days
Packaging Details : 25/50/1000 kg per bag or according to demands from customers
Other name : Sodium metabisulfite
Molecular Formula : Na2S2O5
Application : Bleaching Agent in Making Cotton and Wool
H.S : 28321000
EINECS NO. : 231-673-0
Package : 25/50/1000 kg per bag or according to demands from customers
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Sodium Metabisulite / SMBS as Bleaching Agent in Making Cotton and Wool


Sodium Metabisulfite is white or tiny yellow crystal powder. Its relative density is 1.4. The solubility is 54g / 100ml water at 20°C or 81.7g / 100ml water at 100°C and the solution show acidity. It can solute in glycerine and little in alcohol. When exposed in air , it will oxidized into sodium sulfate and can react with strong acid into sulfur dioxide gas and the salts. It is deliquescent and will decompose when heated to 150°C.

Product Details

Product NameSodium Metabisulfite
Main Content(Na2S2O5)≥97
Insoluble in water%0.004%
Fe(As content Fe)≤0.0015%
Heavy Mental Content(Pb)≤0.0002
Arsenic Content(As)≤0.0001


Industrial Uses

Water Treatment

Eliminating dissolved oxygen in waste water and in pipes;

Cleaning water pipes and reverse osmosis membranes in desalinization equipment as it is an antibacterial.

Sodium metabisulfite is used in water treatment plants to remove excess chlorine.

Bleaching AgentSodium metabisulfite's functions as a bleaching agent , which is useful in making paper pulp , cotton and wool.

Food Preservative

Sodium metabisulphite is commonly used as a food preservative for dried foods , as well as fruit concentrate juices.

Sodium metabisulphite acts as an antimicrobial , inhibiting the growth of fungi and bacteria , thereby keeping food fresh and safe.

In beer and wine manufacturing , sodium metabisulfite is used as both a sterilizer and an antioxidant in the process of brewing beer or fermenting wine.

Other Use

Sodium metabisulphite is an antioxidant additive in inject able medicines and is also used as a reducing agent in pharmaceuticals.

Photographic and film industryFor preparing developer solutions , for acidifying fixing baths (photo grade).
Landscape Gardening

Sodium metabisulphite used in landscape gardening as a tree stump remover , as it disintegrates the lignin -- chemicals in plant cell walls -- in the tree stumps, making them easier to remove.

Fiber IndustryIn the sulphitisation of tanning extract.
Gold miningFor bleaching ground wood , as an antichlor.


Packagepolypropylene weaving bag , paper plastic complex bag and kraft lined with polyethylene plastic bag.
Packing25 / 50 / 1000 kg per bag or according to demands from customers

The product shall be in a cool and dry place , prevent from direct sun-light , water and moisture , avoid contact with strong acid , oxidants or poisonoussubstances.

Exposure to moisture will make it oxidze easily to sodium sulphate.

Do not store it for long time.

Our services

1. Mixed container , we can mix different items in one container.
2. Quality control , before shipment , free sample for test.
3. Prompt shipment with professional documents.
4. Packing as your request , with photo before shipment.
5. Have rights to import and export independently , have our own factory.

Product Tags:

sodium metabisulfite powder


sodium metabisulfite industrial grade

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