CAS RN.:

7681-57-4

EINECS:

231-673-0

H.S.CODE:

2832.1000.00

Component

Industrial Grade

Food Grade

Medicine Grade

Appearance

White or yellowish crystalline powder

Assay(Na2S2O5 )

96.5%min

97%min

98%min

water insoluble matter

0.05%max

0.03%max

0.02%max

Iron content(Fe)

0.005%max

0.003%max

0.002%max

Arsenic content(As)

0.0001%max

0.0001%max

0.0001%max

Pb

0.0005%max

0.0005%max

0.0003%max

Industrial Uses

Water Treatment

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

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

Food Preservative

Antimicrobial

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.

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

Medicinal

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.

DOT Classification:

Not a DOT controlled material

U.N.

Not applicable.

Packing Group:

Not applicable.