Sodium sulfite, technical

Sodium sulfite, technical 25kg, wholesale - a crystalline substance with a pronounced hygroscopicity, colorless or having a slight coloration, readily soluble in ethanol and water. It is characterized by the formation of crystalline hydrates, a highly alkaline environment of solutions. Sodium sulfide refers to anoxic salts, has a high photosensitivity, its oxidation in air is slow. When melting, the substance does not decompose, it is resistant to high temperatures.

Sodium sulfide is a reducing agent, attaches sulfur atoms, participates in ion exchange reactions. Its density is 1.856 g/cm³ and melts at 1176°C. To obtain sodium sulfides, the method of reducing anhydrous sodium sulfide with coal is used. The mixture is placed in rotary shaft kilns, the temperature values ​​of which reach 800-1000°C.

Technical sodium sulfide in Ukraine is produced as a bulk product (in granular or flaked form) or as a monolith.

There are 3 brands of this substance in a monolithic form:

grade A - used for the manufacture of dyes, the production of light skins, export deliveries;

B - in demand at textile and leather enterprises;

B - used in the production of non-ferrous metals.

The chemical formula is Na2S•nH2O, the value of n ranges from 1.9 to 2.4.

Where is it applied?

In metallurgy in the processes of melting some types of non-ferrous metals;

In the chemical industry in the production of cellulose and sulfur dyes as a reducing agent;

In light industry in the process of tanning skins for cleaning skins from hairline;

In laboratories in the form of a reagent for chemical reactions.

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