TIB Chemicals AG Sodium hydrogen sulphite solution

Sodium bisulfite (TIB^® Thio NBS) is a salt of sulfur dioxide, suitable for use in aqueous solutions. Also known as sodium hydrogen sulfite, it is often used as a food additive. A European approval in the classes of additives for antioxidants and preservatives is given under the approval number E 222, indicated by a corresponding indication of the approval number or the endorsement "sulphurised". Sodium bisulfite is primarily used as an enzymblocker in order to counteract the cutback in coloring and flavoring substances contained in foods as well as of vitamins. The enzymatic browning, which often occurs in industrially used potato products, can be treated effectively.

However, TIB^® Thio NBS from TIB Chemicals can be used for many other applications. In particular, it acts as a reducing agent and the detoxification of chromium-containing wastewater - by reduction of VI-valent to III-valent chromium (alternatively, by reduction of hexavalent (CrVI) to trivalent chromium (CrIII)). At the same time, cyanides can be removed in the field of wastewater purification. For this purpose, sodium bisulfite is used as a highly effective reducing agent in the context of the recovery of iodine from chile nitriles as well as in the aldehyde and ketone purification of the chemical-technical industry. The modes of action here are based on an addition reaction with aldehydes or ketones to form bisulfite adducts. This takes place by nucleophilic addition of the sulfur to the carbonyl group with simultaneous formation of a hydroxyalkylsulfonation. At the same time, TIB^® Thio NBS can be used as a basic substance with a catalyzing action in the production of sulfonates, pesticides and herbicides.

Available at TIB Chemicals is a sodium hydrogensulfite solution with a concentration between 38 and 40 (mass) percent.

Other applications of sodium bisulfite  NaHSO₃

Sodium hydrogensulfite is stable only in aqueous solution and therefore available from TIB Chemicals exclusively from solution, a colorless to yellowish liquid. It is approved as a basic substance for the production of cosmetics. It can also serve as a raw material for the production of pulp and chemical pulp. At the same time, however, it is also suitable as a bleaching agent for straw braids, woven fibers or wood sanding. Accordingly, concentrated sodium bisulfite also performs functions in the reductive purification of large laundry facilities in order to effectively clean yellowed white goods.

Accordingly, TIB^® Thio NBS is also suitable as a solvent for dyes used in textiles, as a bleaching and cleaning agent for wool, as a basic material for the preparation of laundry soaps, as a reducing agent in dyeing and printing as well as as antichlor. However, as a preservative, sodium bisulfite can also be included for the brightening of glue, putty or gelatin. The acidic properties are used to coagulate rubber.

Concluding remarks on the use of sodium bisulfite (NaHSO₃)

Sodium hydrogensulfite (TIB^® Thio NBS) from TIB Chemicals is characterized by absolute chemical purity and high quality. For over 50 years large-scale basic chemicals have been produced by TIB Chemicals in Mannheim - Quality "Made in Germany"!