What is the use of sodium sulfide?
Created date: 2019/05/08


The word sodium sulfide seems to be far away from us, but it is widely used in industry and has many advantages, so let me introduce sodium sulfide and its use.


Here are the content list

  • What is sodium sulfide

  • The use of sodium sulfide


What is sodium sulfide

Sodium sulfide (NA2S) is a yellow or brick-red crystalline solid. It occurs naturally under different hydration, the most common is sodium sulfide hydrate (Na2S ·9H2O). Pure sodium sulfide is a colorless crystalline powder. Strong moisture absorption, easy to dissolve in water. The aqueous solution showed a strong alkaline reaction. Touching the skin and hair can cause burns. Therefore, sodium sulfide is commonly known as alkali sulfide. Sodium sulphide aqueous solution is slowly oxidized to sodium sulfate and sodium sulfide in air. The main product of oxidation is sodium sulfate because of the rapid formation of sodium sulfate. Sodium sulphide hydrolyzes in the air, carbonation and metamorphism, constantly releasing hydrogen sulfide gas. Industrial sodium sulfide due to impurities its color is pink, brown red, khaki. Specific gravity, melting point, boiling point, also depending on the influence of impurities.


The use of sodium sulfide

1. In the dye industry, used in the production of sulphide dyes, as raw materials for sulphide and blue sulphide. The printing and dyeing industry is used as a dye aid to dissolve sulphide dyes. In leather industry, it is used to hydrolyze the raw skin and to prepare sodium sulfide to accelerate dry skin immersion and soften. The paper industry is used as a cooking agent for paper. Textile industry is used for decoration and nit ride reduction of man-made fibers and mordants for cotton dyeing. The pharmaceutical industry is used in the production of antipyretic agents such as phenacetin. In addition, it is also used to produce sodium sulfate, sodium hydroxide, sodium sulfide, etc.


2. Adding appropriate amount of sodium sulfide to alkaline etching solution of aluminum and alloy can obviously improve the quality of etched surface, and it can also be used to remove alkaline soluble heavy metal impurities such as zinc in alkaline etching solution.


3. Sodium sulphide can also be used in the treatment of conductive layer in direct electroplating. Through the reaction of sodium sulfide with palladium to form colloid palladium sulfide, a good conductive layer can be formed on the surface of non-metallic metal.


4. Used as an inhibitor. It is also the raw material of sodium sulfate, sodium sulfide, sulphide dyes and so on.


5. Used in the manufacture of sulfur dyes, leather hair remover, metal smelting, photography, rayon decoration, etc.


6. Sodium hydrogen sulfide is more often used as a commercial form than sodium sulfide. It is prepared by absorbing hydrogen sulfide in sodium hydroxide. It is transported in 45% solution with a specific gravity of 1.303 and a pH value of 10.4. Viscosity is 7 centimeters. The solution tends to crystallize below 62 °F (17 °C). Sodium sulphide is used in leather industry, in ore flotation, paper industry, refinery, regenerated lead sulfate, and organic industry.

The above is the use of sodium sulfide, so it can be seen that sodium sulfide is widely used. Welcome to Shaanxi Fuhua to buy sodium sulfide products. If you have any questions, please contact us in time.



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