Sodium Metabisulphite

Sodium Metabisulphite Food Grade E 223 – Na₂S₂O₅

EC No: 231-673-0
CAS No: 7681-57-4
EC name : disodium disulphite
IUPAC name: disodium disulphite
Trade name: Sodium Metabisulphite
Synonyms: Sodium Disulphite, Disulfurous acid, disodium salt (9Cl), Sodium pyrosulfite (Na₂S₂O₅),Disodium pyrosulfite, Pyrosulfurous acid, disodium salt (8CI), Disodium metabisulfite, Disodium disulfite, Anhydrous Sodium Bisulfite
Physical appearance: White, coarse-grain crystalline

Sodium Metabisulphite are white, coarse-grain crystals with a slight odour of SO2.

It is readily soluble in water. The aqueous solution is in the form of sodium hydrogensulphite and decomposes at temperatures above 120 °C.

The chemical substance rapidly absorbs moisture if not stored in tightly closed containments and oxidizes under the separation of gaseous sulphur dioxide.

Sodium Metabisulphite is used in the food and beverage industry as a preservative and for treatment of different food stuffs, because it does not effect the taste of the food stuff respectively does not change it. (Subject to laws relating to food production and distribution applicable in the individual countries).

It is used in the treatment of waste water due to its excellent ability to remove different types of toxic substances, i.e. oil drilling (off shore) and mining.

Also as a reducing agent in the textile industry and chemical industry.

This chemical substance is used as a bleaching agent for brightening or stain removal in the pulp– and paper industry, in the textile industry and other industries.

The photographic industry is using the good performance of Sodium Metabisulphite as a preservative against oxidization, for stabilizing and for acidification.

In the leather industry SMB is used in the tannery.

It complies with the requirements of directive 231/2012/EC, page 73 + 74.

The following certificates are available for this product:
Food Grade
Feed Grade
Water treatment
GMP Food