Sodium sulfide

Sodium sulfide


The main purpose:

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 for aluminum and alloys can significantly improve the quality of the etched surface, and it can also be used for the removal of 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, through the reaction of sodium sulfide and palladium to form colloidal palladium sulfide to achieve the purpose of forming a good conductive layer on the non-metallic surface;
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.


Precautions:

Sulfides in water include soluble H2S, HS-, S2-, soluble sulfides in suspension, acid-soluble metal sulfides, and unionized inorganic and organic sulfides. The water containing sulfide is mostly black and has a pungent odor, which is mainly due to the continuous release of H2S gas from the water. 8μg/m3 of H2S in the air can make people's sense of smell sensitive, and the threshold of H2S in water is 0.035μg/L. Sulfides in water are easily hydrolyzed and released into the air in the form of H2S. After being absorbed in a large amount, people immediately feel nauseated and vomited, and even have difficulty breathing, suffocation, etc., resulting in a strong sense of toxicity.