Product Details

sodium pyrosulfite,sodium metabisulphite,sodium metabisulfite

Product Description

is mainly used as reduction agent. Furthermore, it is ideal for the bleaching of vegetable fibers and textile, for the production of solutions, which are used in the developing of photos and films as well as for the treatment of tanning agents in dyeing of textiles. ChoiceChem offers different sodium metabisulfite grades, all meeting highest quality standards.

CAS RN.:	7681-57-4
EINECS:	231-673-0
H.S.CODE:	2832.1000.00

Chemical Analysis

Component	Range	Typical
Assay(Na₂S₂O₅ )	96.0% min.	97.5%
Iron content(base on Fe)	0.005% max.	0.002%
water insoluble matter	0.05% max.	0.02%
Arsenic content(base on As)	1 ppm max.	1ppm
Pb	10 ppm max.	5ppm
Appearance	White or yellowish crystalline powder

Application

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.

It is used in water treatment plants to remove excess chlorine.

Bleaching Agent

It functions as a bleaching agent, which is useful in making paper pulp, cotton and wool.

Food Preservative

Antimicrobial

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

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

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

Other Uses
Medicinal	It 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	It 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.