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97%Min Food Grade and Industrial Grade Sodium Metabisulphite for Bleaching

Basic Info

Model No.:  97%min sodium metabisulphite

Product Description

Model NO.: 97%min sodium metabisulphite

Grade Standard: Food Grade

Na2s2o5: 97%Min

Water-Insoluble Matter: 0.05% Max

pH Value: 4.0-4.6

Lead (Pb): 0.001% Max

CAS No.: 7681-57-4

Specification: 97%

HS Code: 28321000

Appearance: Powder

Product Name: Sodium Metabisulphite Food Grade

So2: 65% Min

Iron(Fe): 0.003% Max

Arsenic (as): 0.0002% Max

Capacity: 27mts/20′fcl Without Pallets

Trademark: X-HUMATE

Origin: China

Food Grade and Industrial Grade Sodium Metabisulphite 97%min

Molecular formula: Na2S2O6

CAS No.: 7681-57-4

Molecular Weight: 190.12

Appearance:White or light yellow powder.

Odor:Wet condition with strong SO2 smell, Dry none.

Properties:White yellowish crystalline powder. It is soluble in water and alcohol.


Item Standard
Na2S2O5 97%min
SO2 65% min
Water-insoluble Matter 0.05% max
Iron(Fe) 0.003% max
PH value 4.0-4.6
Arsenic (As) 0.0002% max
Lead (Pb) 0.001% max


Bleaching agent (such as candy, cakes, dried slices of tender bamboo shoots etc. ) Loosening agent (such as bread, biscuits etc. ) preservatives, disinfector (such jam and can etc. ) Antioxidant, antistaling agent (such as seafood, fruits, vegetables etc. )


Industrial Use:

1,Eliminating dissolved oxygen in waste water and in pipes;

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

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

Bleaching Agent:

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

2,Food Preservative


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

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

3,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 Uses:


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

Photographic and film industry

For preparing developer solutions, for acidifying fixing baths (photo grade).

Landscape Gardening

Sodium metabisulfite 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 Industry

In the sulphitisation of tanning extract.

Gold mining

For bleaching ground wood, as an antichlor.


1. Bag marks: Sodium metabisulphite, N.W.: 25kgs, G.W. 25.1kgs, Made in China./we also accept clients marks.

2. Packing: 25kgs net PP woven bag with PE liner (if need, we could arrange the pallet.) or other extra packings.

Our Sevice:

1. sample: we can offer sample free, but the freight should be in buyer's charge.

2.transport: we can arrange transportation by sea or by other traffic tools.

3. third party inspection: we welcome all kinds of third party inspection.

4. customer service: any problem of our product, we have experts to help 24/7.

Contact us if you need more details on Sodium Metabisulphite. We are ready to answer your questions on packaging, logistics, certification or any other aspects about Food Grade Sodium Metabisulphite、Sodium Metabisufite. If these products fail to match your need, please contact us and we would like to provide relevant information.

Product Categories : Other Inorganic Salts

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