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Sodium sulfide containing low iron


Item Index
Sodium sulfide (Na2S), ω/% ≥ 60 60 60
Iron (Fe), ω/ppm ≤ 20 30 50
Water insoluble matter, ω/% ≤ 0.02 0.03 0.05
Sodium carbonate, ω/% ≤ 1.5 2 3
Appearance Yellow flake, with uniform size, non-caking

Packing & Storage

Packing Net weight 25.0kg/bag. Inside is double-layer plastic film, hot sealing; outside is woven bag.
Storage 20℃, 2 years.
Shipping Room temperature in China; may vary elsewhere

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General Information

Frequently Asked Questions

Q: What is Sodium sulfide?

A: Sodium sulfide, also known as stinky alkali, stinky soda, and soda sulfide, is an inorganic compound with the chemical formula Na2S and a colorless crystalline powder. It is easily soluble in water, insoluble in ether, and slightly soluble in ethanol. Sodium sulfide is commonly known as alkali sulfide because of it will cause burns when it touches the skin and hair. Sodium sulfide emits toxic hydrogen sulfide gas that smells like rotten eggs when exposed to air. The color of industrial sodium sulfide is pink, brownish red, and khaki due to impurities.

Q: The brief history of the development of Sodium sulfide?

A: Sodium sulfide in China originated in the 1930s, and was first produced on a small scale by a chemical plant in Dalian, Liaoning. From the 1980s to the mid-1990s, with the vigorous development of the international chemical industry, China’s sodium sulfide industry has undergone a fundamental change under the influence. Sodium sulfide manufacturers and scale increase rapidly and develop rapidly. The sodium sulfide production area centered in Yuncheng, Shanxi has rapidly expanded to more than 10 provinces and regions including Yunnan, Xinjiang, Inner Mongolia, Gansu, Qinghai, Ningxia, and Shaanxi. The national annual production capacity of sodium sulfide has soared from 420,000 tons in the late 1980s to 640,000 tons in the mid-1990s. Among them, the fastest growing output is Inner Mongolia, Gansu, and Xinjiang in Northwest China. The production capacity of Inner Mongolia has reached 200,000 tons, and it has become the largest production base of sodium sulfide products in China.


Q: What is the application field of Sodium sulfide?

  1. It is used in the dye industry to produce sulfur dyes, and is the raw material for sulfur blue and sulfur blue. In the printing and dyeing industry, it is used as a dyeing aid for dissolving sulfur dyes. In the tanning industry, it is used for hydrolysis to depilate raw hides, and it is also used to prepare sodium polysulfide to accelerate the soaking of dry hides and soften them. In the paper industry, it is used as a cooking agent for paper. In the textile industry, it is used for the denitrification of man-made fibers and the reduction of nitrates, and as a mordant for cotton fabric dyeing. The pharmaceutical industry is used to produce antipyretics such as phenacetin. In addition, it is also used to make sodium thiosulfate, sodium hydrosulfide, sodium polysulfide, etc.
  2. Adding an appropriate amount of sodium sulfide to the alkaline etching solution of aluminum and alloys can significantly improve the quality of the etched surface, and it can also be used to remove alkali-soluble heavy metal impurities such as zinc in the alkaline etching solution.
  3. Sodium sulfide can also be used for the treatment of the conductive layer in direct electroplating. The purpose of forming a good conductive layer on the non-metallic surface is achieved by the reaction of sodium sulfide and palladium to form colloidal palladium sulfide.
  4. Used as a corrosion inhibitor. It is also the raw material of sodium thiosulfate, sodium polysulfide, sulfur dyes, etc.
  5. Used in the manufacture of sulfur dyes, leather depilatory agents, metal smelting, photography, rayon denitrification, etc.

Q: The safety information when using Sodium sulfide?

A: In case of contact with eyes, rinse your eyes immediately with plenty of water and seek medical advice. If you feel unwell, seek medical advice immediately and show the label whenever possible. Avoid release the material to the environment.