Karatau Chemicals LLP – Sodium pyrosulphite, the construction of which we started in 2023 and will be commissioned in 2025, is the only production facility in the same area in Kazakhstan. Our facility is planned to produce with a capacity of 25,000 tons/year and employ approximately 60 people.

Product function: 

It is used as an SO2 source (mixed with air or oxygen) for the destruction of cyanide in commercial gold cyanidation processes. 

Sodiumpyrosulfite serves as a conservation and anti-oxidation agent. It is mainly used to protect shelfish against melanosis. It is used in the pulp and paper industry, in the photographic industry and in the various other industries as a bleach or dechlorinator. Food Grade sodium metabisulfite may be used as a food preservative. Sodium pyrosulfite can also be used in the manufacture of other chemicals. 

Concentrated pyrosulfite can be used to remove tree stumps. Some brands contain 98% sodium pyrosulfite, and cause degradation of lignin in the stumps, facilitating removal. 

A very important health related aspect of this substance is that it can be added to a blood smear in a test for sickle cell anaemia (and other similar forms of haemoglobin mutation). The substances causes defunct cells to sickle (through a complex polymerisation) hence confirming disease. 

It is used as the source of SO2 in wine, an important anti-oxidant and bactericide.

It is used in waste treatment to chemically reduce hexavalent chromium to trivalent chromium which can then be precipitated and removed from an aqueous waste stream. 

It is used as a bleaching agent in the production of coconut cream. 

It is used in the oil and gas industry as a corrosion inhibitor/oxygen scavenger. 

It is used in the water treatment industry to quench chlorine residual.

It is used in tint etching iron-based metal samples for microstructural analysis. 

Code of sodiumpyrosulfite is E-223 in food codex.