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Sodium Hydrosulfide

Sodium Hydrosulfide

Colorless needle-like crystals. Deliquescence. At the melting point, hydrogen sulfide is liberated. Easily soluble in water and alcohol. The aqueous solution is strongly alkaline. It reacts with acid to generate hydrogen sulfide. Bitter taste. Used in the dye industry to synthesize organic intermediates and to prepare auxiliaries for the preparation of sulfur dyes, in the leather industry for dehairing and tanning of hides, in the chemical fertilizer industry to remove monomer sulfur in activated carbon desulfurizers, and in the mining industry for copper ore. It is used for sulphurous acid dyeing in ore dressing and man-made fiber production. It is the raw material for the manufacture of semi-finished products of ammonium sulfide and pesticide ethyl mercaptan. It is also used for wastewater treatment. It is obtained by absorbing hydrogen sulfide gas from alkali sulfide or caustic soda solution.


Chinese name: Sodium Hydrosulfide

Chinese synonyms: acidic sodium sulfide; sodium hydrosulfide (70%); sodium hydrosulfide; sodium hydrosulfide (NAHS, XH2O); sodium hydrogen sulfide; sodium hydrogen sulfide anhydrous;

Mol file: 16721-80-5.mol;

CAS NO: 16721-80-5;

EINECS number: 240-778-0.

Physical properties

Appearance and properties: white to colorless cubic crystals with the smell of hydrogen sulfide; industrial products are generally in solution, orange or yellow.

Chemical nature

Stability: stable

It quickly decomposes into sodium hydroxide and sodium sulfide in moist air, emits heat and is easy to ignite spontaneously.

It turns yellow or orange when heated in dry air, and turns black when it melts. It dissolves in HCl to produce H2S, and the reaction is intense. Easily deliquescence, strong hygroscopicity, easy to oxidize, hydrogen sulfide and sulfur are often released during storage.


Dyestuff industry is used to synthesize organic intermediates and auxiliary agents for the preparation of sulfur dyes. In the tanning industry, it is used for dehairing and tanning of hides, and also for wastewater treatment. The fertilizer industry is used to remove the monomer sulfur in the activated carbon desulfurizer. It is the raw material for manufacturing semi-finished products of ammonium sulfide and pesticide ethyl mercaptan. The mining industry is widely used in copper ore beneficiation. Used in sulfurous acid dyeing in man-made fiber production.


Overview of folding hazards

Health hazards: It has a strong stimulating effect on eyes, skin, mucous membranes and upper respiratory tract. After inhalation, it can cause spasm, inflammation and edema of the larynx and bronchi, chemical pneumonia or pulmonary edema. Symptoms of poisoning can include burning sensation, wheezing, laryngitis, shortness of breath, headache, nausea and vomiting. Direct contact with eyes can cause irreversible damage and even blindness.

Environmental hazards: Harmful to the environment and may cause pollution to water bodies.

Explosion hazard: This product is a spontaneous combustion material, highly toxic, and highly irritating.

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